762 lines
35 KiB
Java
762 lines
35 KiB
Java
package cy.agorise.graphenej.api.android;
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import android.util.SparseArray;
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import com.google.gson.Gson;
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import com.google.gson.GsonBuilder;
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import com.google.gson.reflect.TypeToken;
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import java.io.Serializable;
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import java.lang.reflect.Type;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Locale;
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import java.util.MissingResourceException;
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import java.util.concurrent.TimeUnit;
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import cy.agorise.graphenej.Asset;
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import cy.agorise.graphenej.AssetAmount;
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import cy.agorise.graphenej.BaseOperation;
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import cy.agorise.graphenej.LimitOrder;
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import cy.agorise.graphenej.Memo;
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import cy.agorise.graphenej.RPC;
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import cy.agorise.graphenej.Transaction;
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import cy.agorise.graphenej.UserAccount;
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import cy.agorise.graphenej.api.ApiAccess;
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import cy.agorise.graphenej.api.ApiCallback;
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import cy.agorise.graphenej.api.ConnectionStatusUpdate;
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import cy.agorise.graphenej.api.calls.ApiCallable;
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import cy.agorise.graphenej.api.calls.GetAccountBalances;
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import cy.agorise.graphenej.api.calls.GetAccounts;
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import cy.agorise.graphenej.api.calls.GetAssets;
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import cy.agorise.graphenej.api.calls.GetFullAccounts;
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import cy.agorise.graphenej.api.calls.GetKeyReferences;
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import cy.agorise.graphenej.api.calls.GetLimitOrders;
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import cy.agorise.graphenej.api.calls.GetMarketHistory;
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import cy.agorise.graphenej.api.calls.GetObjects;
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import cy.agorise.graphenej.api.calls.GetRelativeAccountHistory;
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import cy.agorise.graphenej.api.calls.GetRequiredFees;
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import cy.agorise.graphenej.api.calls.ListAssets;
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import cy.agorise.graphenej.models.AccountProperties;
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import cy.agorise.graphenej.models.ApiCall;
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import cy.agorise.graphenej.models.BitAssetData;
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import cy.agorise.graphenej.models.Block;
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import cy.agorise.graphenej.models.BlockHeader;
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import cy.agorise.graphenej.models.BucketObject;
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import cy.agorise.graphenej.models.DynamicGlobalProperties;
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import cy.agorise.graphenej.models.FullAccountDetails;
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import cy.agorise.graphenej.models.HistoryOperationDetail;
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import cy.agorise.graphenej.models.JsonRpcNotification;
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import cy.agorise.graphenej.models.JsonRpcResponse;
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import cy.agorise.graphenej.models.OperationHistory;
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import cy.agorise.graphenej.network.FullNode;
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import cy.agorise.graphenej.network.LatencyNodeProvider;
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import cy.agorise.graphenej.network.NodeLatencyVerifier;
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import cy.agorise.graphenej.network.NodeProvider;
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import cy.agorise.graphenej.operations.CustomOperation;
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import cy.agorise.graphenej.operations.LimitOrderCreateOperation;
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import cy.agorise.graphenej.operations.TransferOperation;
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import io.reactivex.Observable;
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import io.reactivex.Observer;
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import io.reactivex.android.schedulers.AndroidSchedulers;
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import io.reactivex.disposables.CompositeDisposable;
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import io.reactivex.disposables.Disposable;
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import io.reactivex.functions.Consumer;
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import io.reactivex.subjects.PublishSubject;
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import okhttp3.OkHttpClient;
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import okhttp3.Request;
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import okhttp3.Response;
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import okhttp3.WebSocket;
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import okhttp3.WebSocketListener;
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/**
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* Class in charge of maintaining a connection to the full node.
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*/
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public class NetworkService {
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public static final int NORMAL_CLOSURE_STATUS = 1000;
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private static final int GOING_AWAY_STATUS = 1001;
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// Time to wait before retrying a connection attempt
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private static final int DEFAULT_RETRY_DELAY = 500;
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// Default connection delay when using the node latency verification strategy. This initial
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// delay is required in order ot make sure we have a fair selection of node latencies from
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// which we can choose from.
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private final int DEFAULT_INITIAL_DELAY = 500;
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private WebSocket mWebSocket;
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// Username and password used to connect to a specific node
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private String mUsername;
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private String mPassword;
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private boolean isLoggedIn = false;
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private String mLastCall;
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private long mCurrentId = 0;
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// Requested APIs passed to this service
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private int mRequestedApis = ApiAccess.API_DATABASE | ApiAccess.API_HISTORY | ApiAccess.API_NETWORK_BROADCAST;
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// Variable used to keep track of the currently obtained API accesses
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private HashMap<Integer, Integer> mApiIds = new HashMap<Integer, Integer>();
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// Variable used as a source of node information
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private NodeProvider nodeProvider = new LatencyNodeProvider();
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// Class used to obtain frequent node latency updates
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private NodeLatencyVerifier nodeLatencyVerifier;
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// PublishSubject used to announce full node latencies updates
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private PublishSubject<FullNode> fullNodePublishSubject;
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// Counter used to trigger the connection only after we've received enough node latency updates
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private long latencyUpdateCounter;
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// Property used to keep track of the currently active node
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private FullNode mSelectedNode;
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private CompositeDisposable mCompositeDisposable;
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private HashMap<Long, ApiCallback> mCallbackMap = new HashMap<Long, ApiCallback>();
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private Gson gson = new GsonBuilder()
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.registerTypeAdapter(Transaction.class, new Transaction.TransactionDeserializer())
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.registerTypeAdapter(TransferOperation.class, new TransferOperation.TransferDeserializer())
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.registerTypeAdapter(LimitOrderCreateOperation.class, new LimitOrderCreateOperation.LimitOrderCreateDeserializer())
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.registerTypeAdapter(CustomOperation.class, new CustomOperation.CustomOperationDeserializer())
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.registerTypeAdapter(AssetAmount.class, new AssetAmount.AssetAmountDeserializer())
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.registerTypeAdapter(UserAccount.class, new UserAccount.UserAccountSimpleDeserializer())
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.registerTypeAdapter(DynamicGlobalProperties.class, new DynamicGlobalProperties.DynamicGlobalPropertiesDeserializer())
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.registerTypeAdapter(Memo.class, new Memo.MemoDeserializer())
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.registerTypeAdapter(BaseOperation.class, new BaseOperation.OperationDeserializer())
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.registerTypeAdapter(OperationHistory.class, new OperationHistory.OperationHistoryDeserializer())
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.registerTypeAdapter(JsonRpcNotification.class, new JsonRpcNotification.JsonRpcNotificationDeserializer())
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.create();
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// Map used to keep track of outgoing request ids and its request types. This is just
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// one of two required mappings. The second one is implemented by the DeserializationMap
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// class.
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private HashMap<Long, Class> mRequestClassMap = new HashMap<>();
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// This class is used to keep track of the mapping between request classes and response
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// payload classes. It also provides a handy method that returns a Gson deserializer instance
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// suited for every response type.
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private DeserializationMap mDeserializationMap = new DeserializationMap();
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/**
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* Singleton reference
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*/
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private static NetworkService instance;
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/**
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* Private constructor
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*/
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private NetworkService(){}
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/**
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* Thread-safe singleton getter.
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* @return A NetworkService instance.
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*/
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public static NetworkService getInstance(){
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if(instance == null) {
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synchronized (NetworkService.class) {
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if(instance == null) {
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instance = new NetworkService();
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}
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}
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}
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return instance;
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}
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/**
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* Actually establishes a connection from this Service to one of the full nodes.
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*/
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public void connect(){
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OkHttpClient client = new OkHttpClient
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.Builder()
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.connectTimeout(2, TimeUnit.SECONDS)
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.readTimeout(5, TimeUnit.SECONDS)
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.writeTimeout(5, TimeUnit.SECONDS)
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.build();
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synchronized (mWebSocketListener){
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mSelectedNode = nodeProvider.getBestNode();
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if(mSelectedNode != null){
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System.out.println("Trying to connect to: "+ mSelectedNode.getUrl());
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Request request = new Request.Builder().url(mSelectedNode.getUrl()).build();
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mWebSocket = client.newWebSocket(request, mWebSocketListener);
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}else{
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System.out.println("Could not find best node, reescheduling");
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// If no node could be found yet, schedule a new attempt in DEFAULT_INITIAL_DELAY ms
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Disposable d = Observable.timer(DEFAULT_INITIAL_DELAY, TimeUnit.MILLISECONDS).subscribe(mConnectAttempt);
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mCompositeDisposable.add(d);
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}
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}
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}
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public long sendMessage(String message){
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if(mWebSocket != null){
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if(mWebSocket.send(message)){
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System.out.println("-> " + message);
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return mCurrentId;
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}
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}else{
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throw new RuntimeException("Websocket connection has not yet been established");
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}
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return -1;
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}
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/**
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* Method that will send a message to the full node, and takes as an argument one of the
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* API call wrapper classes. This is the preferred method of sending blockchain API calls.
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*
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* @param apiCallable The object that will get serialized into a request
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* @param requiredApi The required APIs for this specific request. Should be one of the
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* constants specified in the ApiAccess class.
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* @return The id of the message that was just sent, or -1 if no message was sent.
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*/
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public synchronized long sendMessage(ApiCallable apiCallable, int requiredApi){
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if(requiredApi != -1 && mApiIds.containsKey(requiredApi) || requiredApi == ApiAccess.API_NONE){
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int apiId = 0;
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if(requiredApi != ApiAccess.API_NONE)
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apiId = mApiIds.get(requiredApi);
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ApiCall call = apiCallable.toApiCall(apiId, ++mCurrentId);
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mRequestClassMap.put(mCurrentId, apiCallable.getClass());
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if(mWebSocket != null && mWebSocket.send(call.toJsonString())){
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System.out.println("-> "+call.toJsonString());
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return mCurrentId;
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}
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}
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return -1;
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}
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public synchronized long sendMessage(ApiCallable apiCallable, int requiredApi, ApiCallback callback){
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long id = this.sendMessage(apiCallable, requiredApi);
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if(callback != null){
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if(id != -1){
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mCallbackMap.put(id, callback);
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}else{
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callback.onFailure(new Exception("Message could not be sent"), null);
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}
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}
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return id;
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}
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/**
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* Method used to inform any external party a clue about the current connectivity status
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* @return True if the service is currently connected and logged in, false otherwise.
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*/
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public boolean isConnected(){
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return mWebSocket != null && isLoggedIn;
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}
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/**
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* Stops the service by closing the connection and stopping the latency verifier.
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*/
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public void stop() {
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if(mWebSocket != null)
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mWebSocket.close(NORMAL_CLOSURE_STATUS, null);
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if(nodeLatencyVerifier != null)
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nodeLatencyVerifier.stop();
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mCompositeDisposable.dispose();
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mCallbackMap.clear();
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}
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/**
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* Starts the connection
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*/
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public void start(String[] urls, double alpha) {
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mCompositeDisposable = new CompositeDisposable();
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// Retrieving credentials and requested API data from the shared preferences
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mUsername = "";
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mPassword = "";
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if(urls == null || urls.length == 0){
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throw new MissingResourceException("Expecting at least a node URL to be provided", String.class.getName(), "urls");
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}
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// Feeding all node information to the NodeProvider instance
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for(String nodeUrl : urls){
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nodeProvider.addNode(new FullNode(nodeUrl));
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}
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ArrayList<FullNode> fullNodes = new ArrayList<>();
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for(String url : urls){
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fullNodes.add(new FullNode(url, alpha));
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}
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nodeLatencyVerifier = new NodeLatencyVerifier(fullNodes);
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fullNodePublishSubject = nodeLatencyVerifier.start();
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fullNodePublishSubject.observeOn(AndroidSchedulers.mainThread()).subscribe(nodeLatencyObserver);
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Disposable d = Observable.timer(DEFAULT_INITIAL_DELAY, TimeUnit.MILLISECONDS).subscribe(mConnectAttempt);
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mCompositeDisposable.add(d);
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}
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/**
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* Used to close the current connection and cause the service to attempt a reconnection.
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*/
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public void reconnectNode() {
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mWebSocket.close(GOING_AWAY_STATUS, null);
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}
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/**
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* Consumer that will perform a connection attempt with the best node after DEFAULT_INITIAL_DELAY
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* milliseconds. This is used only if the node latency verification is activated.
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*
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* The reason to delay the initial connection is that we want to ideally connect to the best node,
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* meaning the one that offers the lowest latency value. But we have to give some time for the
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* first node latency measurement round to finish in order to have at least a partial result set
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* that could be used.
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*/
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private Consumer mConnectAttempt = new Consumer() {
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@Override
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public void accept(Object o) throws Exception {
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FullNode fullNode = nodeProvider.getBestNode();
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if(fullNode != null){
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System.out.println(String.format(Locale.ROOT, "Connected with %d latency results", latencyUpdateCounter));
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mApiIds.clear();
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connect();
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}else{
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Disposable d = Observable.timer(DEFAULT_INITIAL_DELAY, TimeUnit.MILLISECONDS).subscribe(this);
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mCompositeDisposable.add(d);
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}
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}
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};
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/**
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* Observer used to be notified about node latency measurement updates.
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*/
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private Observer<FullNode> nodeLatencyObserver = new Observer<FullNode>() {
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@Override
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public void onSubscribe(Disposable d) { }
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@Override
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public void onNext(FullNode fullNode) {
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latencyUpdateCounter++;
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// Updating the node with the new latency measurement
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nodeProvider.updateNode(fullNode);
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}
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@Override
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public void onError(Throwable e) {
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System.out.println("nodeLatencyObserver.onError.Msg: "+e.getMessage());
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}
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@Override
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public void onComplete() { }
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};
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/**
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* Method used to execute every callback failure method and remove them from the SparseArray.
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*
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* @param throwable
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* @param response
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*/
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private void resetCallbacks(Throwable throwable, Response response){
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for(ApiCallback callback : mCallbackMap.values()) {
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if(callback != null) {
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callback.onFailure(throwable, response);
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mCallbackMap.remove(callback);
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}
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}
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}
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private WebSocketListener mWebSocketListener = new WebSocketListener() {
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@Override
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public synchronized void onOpen(WebSocket webSocket, Response response) {
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super.onOpen(webSocket, response);
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// Marking the selected node as connected
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mSelectedNode.setConnected(true);
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// Updating the selected node's 'connected' status on the NodeLatencyVerifier instance
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if(nodeLatencyVerifier != null)
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nodeLatencyVerifier.updateActiveNodeInformation(mSelectedNode);
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// Notifying all listeners about the new connection status
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RxBus.getBusInstance().send(new ConnectionStatusUpdate(ConnectionStatusUpdate.CONNECTED, ApiAccess.API_NONE));
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// If we're not yet logged in, we should do it now
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if(!isLoggedIn){
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ArrayList<Serializable> loginParams = new ArrayList<>();
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loginParams.add(mUsername);
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loginParams.add(mPassword);
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ApiCall loginCall = new ApiCall(1, RPC.CALL_LOGIN, loginParams, RPC.VERSION, ++mCurrentId);
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mLastCall = RPC.CALL_LOGIN;
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sendMessage(loginCall.toJsonString());
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}
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}
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@Override
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public synchronized void onMessage(WebSocket webSocket, String text) {
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super.onMessage(webSocket, text);
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System.out.println("<- "+text);
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JsonRpcNotification notification = gson.fromJson(text, JsonRpcNotification.class);
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if(notification.method != null){
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// If we are dealing with a notification
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handleJsonRpcNotification(notification);
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}else{
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// If we are dealing with a response
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JsonRpcResponse<?> response = gson.fromJson(text, JsonRpcResponse.class);
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if(response.result != null){
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// Handling initial handshake with the full node (authentication and API access checks)
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if(response.result instanceof Double || response.result instanceof Boolean){
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switch (mLastCall) {
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case RPC.CALL_LOGIN:
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isLoggedIn = true;
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// Broadcasting result
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RxBus.getBusInstance().send(new ConnectionStatusUpdate(ConnectionStatusUpdate.AUTHENTICATED, ApiAccess.API_NONE));
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checkNextRequestedApiAccess();
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break;
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case RPC.CALL_DATABASE: {
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// Deserializing integer response
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Type IntegerJsonResponse = new TypeToken<JsonRpcResponse<Integer>>() {}.getType();
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JsonRpcResponse<Integer> apiIdResponse = gson.fromJson(text, IntegerJsonResponse);
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// Storing the "database" api id
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mApiIds.put(ApiAccess.API_DATABASE, apiIdResponse.result);
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// Broadcasting result
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RxBus.getBusInstance().send(new ConnectionStatusUpdate(ConnectionStatusUpdate.API_UPDATE, ApiAccess.API_DATABASE));
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checkNextRequestedApiAccess();
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break;
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}
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case RPC.CALL_HISTORY: {
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// Deserializing integer response
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Type IntegerJsonResponse = new TypeToken<JsonRpcResponse<Integer>>() {}.getType();
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JsonRpcResponse<Integer> apiIdResponse = gson.fromJson(text, IntegerJsonResponse);
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// Broadcasting result
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RxBus.getBusInstance().send(new ConnectionStatusUpdate(ConnectionStatusUpdate.API_UPDATE, ApiAccess.API_HISTORY));
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// Storing the "history" api id
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mApiIds.put(ApiAccess.API_HISTORY, apiIdResponse.result);
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checkNextRequestedApiAccess();
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break;
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}
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case RPC.CALL_NETWORK_BROADCAST:
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// Deserializing integer response
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Type IntegerJsonResponse = new TypeToken<JsonRpcResponse<Integer>>() {}.getType();
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JsonRpcResponse<Integer> apiIdResponse = gson.fromJson(text, IntegerJsonResponse);
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// Broadcasting result
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RxBus.getBusInstance().send(new ConnectionStatusUpdate(ConnectionStatusUpdate.API_UPDATE, ApiAccess.API_NETWORK_BROADCAST));
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// Storing the "network_broadcast" api access
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mApiIds.put(ApiAccess.API_NETWORK_BROADCAST, apiIdResponse.result);
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// All calls have been handled at this point
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mLastCall = "";
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break;
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}
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}
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}
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if(response.error != null && response.error.message != null){
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// We could not make sense of this incoming message, just log a warning
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System.out.println("Error.Msg: "+response.error.message);
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}
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// Properly de-serialize all other fields and broadcasts to the event bus
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handleJsonRpcResponse(response, text);
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}
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}
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/**
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* Private method that will de-serialize all fields of every kind of JSON-RPC response
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* and broadcast it to the event bus.
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*
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* @param response De-serialized response
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* @param text Raw text, as received
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*/
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private void handleJsonRpcResponse(JsonRpcResponse response, String text){
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|
JsonRpcResponse parsedResponse = null;
|
|
|
|
Class requestClass = mRequestClassMap.get(response.id);
|
|
if(requestClass != null){
|
|
// Removing the class entry in the map
|
|
mRequestClassMap.remove(response.id);
|
|
|
|
// Obtaining the response payload class
|
|
Class responsePayloadClass = mDeserializationMap.getReceivedClass(requestClass);
|
|
Gson gson = mDeserializationMap.getGson(requestClass);
|
|
if(responsePayloadClass == Block.class){
|
|
// If the response payload is a Block instance, we proceed to de-serialize it
|
|
Type GetBlockResponse = new TypeToken<JsonRpcResponse<Block>>() {}.getType();
|
|
parsedResponse = gson.fromJson(text, GetBlockResponse);
|
|
}else if(responsePayloadClass == BlockHeader.class){
|
|
// If the response payload is a BlockHeader instance, we proceed to de-serialize it
|
|
Type GetBlockHeaderResponse = new TypeToken<JsonRpcResponse<BlockHeader>>(){}.getType();
|
|
parsedResponse = gson.fromJson(text, GetBlockHeaderResponse);
|
|
} else if(responsePayloadClass == AccountProperties.class){
|
|
Type GetAccountByNameResponse = new TypeToken<JsonRpcResponse<AccountProperties>>(){}.getType();
|
|
parsedResponse = gson.fromJson(text, GetAccountByNameResponse);
|
|
} else if(responsePayloadClass == HistoryOperationDetail.class){
|
|
Type GetAccountHistoryByOperationsResponse = new TypeToken<JsonRpcResponse<HistoryOperationDetail>>(){}.getType();
|
|
parsedResponse = gson.fromJson(text, GetAccountHistoryByOperationsResponse);
|
|
}else if(responsePayloadClass == DynamicGlobalProperties.class){
|
|
Type GetDynamicGlobalPropertiesResponse = new TypeToken<JsonRpcResponse<DynamicGlobalProperties>>(){}.getType();
|
|
parsedResponse = gson.fromJson(text, GetDynamicGlobalPropertiesResponse);
|
|
}else if(responsePayloadClass == Transaction.class){
|
|
Type GetTransactionClass = new TypeToken<JsonRpcResponse<Transaction>>(){}.getType();
|
|
parsedResponse = gson.fromJson(text, GetTransactionClass);
|
|
}else if(responsePayloadClass == List.class){
|
|
// If the response payload is a List, further inquiry is required in order to
|
|
// determine a list of what is expected here
|
|
if(requestClass == GetAccounts.class){
|
|
// If the request call was the wrapper to the get_accounts API call, we know
|
|
// the response should be in the form of a JsonRpcResponse<List<AccountProperties>>
|
|
// so we proceed with that
|
|
Type GetAccountsResponse = new TypeToken<JsonRpcResponse<List<AccountProperties>>>(){}.getType();
|
|
parsedResponse = gson.fromJson(text, GetAccountsResponse);
|
|
}else if(requestClass == GetRequiredFees.class){
|
|
Type GetRequiredFeesResponse = new TypeToken<JsonRpcResponse<List<AssetAmount>>>(){}.getType();
|
|
parsedResponse = gson.fromJson(text, GetRequiredFeesResponse);
|
|
}else if(requestClass == GetRelativeAccountHistory.class){
|
|
Type RelativeAccountHistoryResponse = new TypeToken<JsonRpcResponse<List<OperationHistory>>>(){}.getType();
|
|
parsedResponse = gson.fromJson(text, RelativeAccountHistoryResponse);
|
|
}else if(requestClass == GetMarketHistory.class){
|
|
Type GetMarketHistoryResponse = new TypeToken<JsonRpcResponse<List<BucketObject>>>(){}.getType();
|
|
parsedResponse = gson.fromJson(text, GetMarketHistoryResponse);
|
|
}else if(requestClass == GetObjects.class){
|
|
parsedResponse = handleGetObject(text);
|
|
}else if(requestClass == ListAssets.class){
|
|
Type LisAssetsResponse = new TypeToken<JsonRpcResponse<List<Asset>>>(){}.getType();
|
|
parsedResponse = gson.fromJson(text, LisAssetsResponse);
|
|
}else if(requestClass == GetLimitOrders.class){
|
|
Type GetLimitOrdersResponse = new TypeToken<JsonRpcResponse<List<LimitOrder>>>() {}.getType();
|
|
parsedResponse = gson.fromJson(text, GetLimitOrdersResponse);
|
|
} else if (requestClass == GetFullAccounts.class) {
|
|
Type GetFullAccountsResponse = new TypeToken<JsonRpcResponse<List<FullAccountDetails>>>(){}.getType();
|
|
parsedResponse = gson.fromJson(text, GetFullAccountsResponse);
|
|
} else if(requestClass == GetKeyReferences.class){
|
|
Type GetKeyReferencesResponse = new TypeToken<JsonRpcResponse<List<List<UserAccount>>>>(){}.getType();
|
|
parsedResponse = gson.fromJson(text, GetKeyReferencesResponse);
|
|
} else if(requestClass == GetAccountBalances.class){
|
|
Type GetAccountBalancesResponse = new TypeToken<JsonRpcResponse<List<AssetAmount>>>(){}.getType();
|
|
parsedResponse = gson.fromJson(text, GetAccountBalancesResponse);
|
|
} else if(requestClass == GetAssets.class){
|
|
Type GetAssetsResponse = new TypeToken<JsonRpcResponse<List<Asset>>>(){}.getType();
|
|
parsedResponse = gson.fromJson(text, GetAssetsResponse);
|
|
}else {
|
|
System.out.println("Unknown request class");
|
|
}
|
|
}else{
|
|
System.out.println("Unhandled situation");
|
|
}
|
|
}
|
|
|
|
// In case the parsedResponse instance is null, we fall back to the raw response
|
|
if(parsedResponse == null){
|
|
parsedResponse = response;
|
|
}
|
|
|
|
// Executing callback, if present with the parsed response
|
|
if(mCallbackMap.containsKey(response.id)){
|
|
ApiCallback callback = mCallbackMap.get(response.id);
|
|
if(response.error == null)
|
|
callback.onResponse(parsedResponse, text);
|
|
else
|
|
callback.onFailure(new Exception("Exception while trying to parse node response. Message: " + response.error.message), null);
|
|
mCallbackMap.remove(response.id);
|
|
}
|
|
|
|
// Broadcasting the parsed response to all interested listeners
|
|
RxBus.getBusInstance().send(parsedResponse);
|
|
}
|
|
|
|
/**
|
|
* Private method that will just broadcast a de-serialized notification to all interested parties
|
|
* @param notification De-serialized notification
|
|
*/
|
|
private void handleJsonRpcNotification(JsonRpcNotification notification){
|
|
// Broadcasting the parsed notification to all interested listeners
|
|
RxBus.getBusInstance().send(notification);
|
|
}
|
|
|
|
/**
|
|
* Method used to try to deserialize a 'get_objects' API call. Since this request can be used
|
|
* for several types of objects, the de-serialization procedure can be a bit more complex.
|
|
*
|
|
* @param response Response to a 'get_objects' API call
|
|
*/
|
|
private JsonRpcResponse handleGetObject(String response){
|
|
//TODO: Add support for other types of 'get_objects' request types
|
|
Gson gson = mDeserializationMap.getGson(GetObjects.class);
|
|
Type GetBitAssetResponse = new TypeToken<JsonRpcResponse<List<BitAssetData>>>(){}.getType();
|
|
return gson.fromJson(response, GetBitAssetResponse);
|
|
}
|
|
|
|
/**
|
|
* Method used to check all possible API accesses.
|
|
*
|
|
* The service will try to obtain sequentially API access ids for the following APIs:
|
|
*
|
|
* - Database
|
|
* - History
|
|
* - Network broadcast
|
|
*/
|
|
private void checkNextRequestedApiAccess(){
|
|
if( (mRequestedApis & ApiAccess.API_DATABASE) == ApiAccess.API_DATABASE &&
|
|
mApiIds.get(ApiAccess.API_DATABASE) == null){
|
|
// If we need the "database" api access and we don't yet have it
|
|
|
|
ApiCall apiCall = new ApiCall(1, RPC.CALL_DATABASE, null, RPC.VERSION, ++mCurrentId);
|
|
mLastCall = RPC.CALL_DATABASE;
|
|
sendMessage(apiCall.toJsonString());
|
|
} else if( (mRequestedApis & ApiAccess.API_HISTORY) == ApiAccess.API_HISTORY &&
|
|
mApiIds.get(ApiAccess.API_HISTORY) == null){
|
|
// If we need the "history" api access and we don't yet have it
|
|
|
|
ApiCall apiCall = new ApiCall(1, RPC.CALL_HISTORY, null, RPC.VERSION, ++mCurrentId);
|
|
mLastCall = RPC.CALL_HISTORY;
|
|
sendMessage(apiCall.toJsonString());
|
|
}else if( (mRequestedApis & ApiAccess.API_NETWORK_BROADCAST) == ApiAccess.API_NETWORK_BROADCAST &&
|
|
mApiIds.get(ApiAccess.API_NETWORK_BROADCAST) == null){
|
|
// If we need the "network_broadcast" api access and we don't yet have it
|
|
|
|
ApiCall apiCall = new ApiCall(1, RPC.CALL_NETWORK_BROADCAST, null, RPC.VERSION, ++mCurrentId);
|
|
mLastCall = RPC.CALL_NETWORK_BROADCAST;
|
|
sendMessage(apiCall.toJsonString());
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public void onClosed(WebSocket webSocket, int code, String reason) {
|
|
super.onClosed(webSocket, code, reason);
|
|
resetCallbacks(new Exception("Websocket closed. Reason: " + reason), null);
|
|
if(code == GOING_AWAY_STATUS)
|
|
handleWebSocketDisconnection(true, false);
|
|
else
|
|
handleWebSocketDisconnection(false, false);
|
|
}
|
|
|
|
@Override
|
|
public void onFailure(WebSocket webSocket, Throwable t, Response response) {
|
|
super.onFailure(webSocket, t, response);
|
|
resetCallbacks(t, response);
|
|
System.out.println("onFailure. Exception: "+t.getClass().getName()+", Msg: "+t.getMessage());
|
|
// Logging error stack trace
|
|
for(StackTraceElement element : t.getStackTrace()){
|
|
System.out.println(String.format("%s#%s:%s", element.getClassName(), element.getMethodName(), element.getLineNumber()));
|
|
}
|
|
|
|
// If there is a response, we print it
|
|
if(response != null){
|
|
System.out.println("Response: "+response.message());
|
|
}
|
|
|
|
handleWebSocketDisconnection(true, true);
|
|
}
|
|
|
|
/**
|
|
* Method that encapsulates the behavior of handling a disconnection to the current node, and
|
|
* potentially tries to reconnect to another one.
|
|
*
|
|
* @param tryReconnection States if a reconnection to other node should be tried.
|
|
* @param penalizeNode Whether or not to penalize the current node with a very high latency reading.
|
|
*/
|
|
private synchronized void handleWebSocketDisconnection(boolean tryReconnection, boolean penalizeNode) {
|
|
System.out.println("handleWebSocketDisconnection. try reconnection: " + tryReconnection + ", penalizeNode: " + penalizeNode);
|
|
RxBus.getBusInstance().send(new ConnectionStatusUpdate(ConnectionStatusUpdate.DISCONNECTED, ApiAccess.API_NONE));
|
|
isLoggedIn = false;
|
|
|
|
// Clearing previous request id to class mappings
|
|
mRequestClassMap.clear();
|
|
|
|
if(mSelectedNode != null){
|
|
// Marking the selected node as not connected
|
|
mSelectedNode.setConnected(false);
|
|
|
|
// Updating the selected node's 'connected' status on the NodeLatencyVerifier instance
|
|
if(nodeLatencyVerifier != null)
|
|
nodeLatencyVerifier.updateActiveNodeInformation(mSelectedNode);
|
|
|
|
if (penalizeNode){
|
|
// Adding a very high latency value to this node in order to prevent
|
|
// us from getting it again
|
|
mSelectedNode.addLatencyValue(Long.MAX_VALUE);
|
|
nodeProvider.updateNode(mSelectedNode);
|
|
}
|
|
}
|
|
|
|
if(tryReconnection) {
|
|
// Registering current status
|
|
mCurrentId = 0;
|
|
mApiIds.clear();
|
|
|
|
RxBus.getBusInstance().send(new ConnectionStatusUpdate(ConnectionStatusUpdate.DISCONNECTED, ApiAccess.API_NONE));
|
|
|
|
if (nodeProvider.getBestNode() == null) {
|
|
System.out.println( "Giving up on connections");
|
|
} else {
|
|
Disposable d = Observable.timer(DEFAULT_RETRY_DELAY, TimeUnit.MILLISECONDS).subscribe(new Consumer<Long>() {
|
|
@Override
|
|
public void accept(Long aLong) throws Exception {
|
|
connect();
|
|
}
|
|
});
|
|
mCompositeDisposable.add(d);
|
|
}
|
|
}
|
|
|
|
// We have currently no selected node
|
|
mSelectedNode = null;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Method used to check whether or not the network service is connected to a node that
|
|
* offers a specific API.
|
|
*
|
|
* @param whichApi The API we want to use.
|
|
* @return True if the node has got that API enabled, false otherwise
|
|
*/
|
|
public boolean hasApiId(int whichApi){
|
|
return mApiIds.get(whichApi) != null;
|
|
}
|
|
|
|
/**
|
|
* Updates the full node details
|
|
* @param fullNode Updated {@link FullNode} instance
|
|
*/
|
|
public void updateNode(FullNode fullNode){
|
|
nodeProvider.updateNode(fullNode);
|
|
}
|
|
|
|
/**
|
|
* Returns a list of {@link FullNode} instances
|
|
* @return List of full nodes
|
|
*/
|
|
public List<FullNode> getNodes(){
|
|
return nodeProvider.getSortedNodes();
|
|
}
|
|
|
|
|
|
/**
|
|
* Returns the currently selected node
|
|
*/
|
|
public FullNode getSelectedNode() { return mSelectedNode; }
|
|
|
|
/**
|
|
* Returns an observable that will notify its observers about node latency updates.
|
|
* @return Observer of {@link FullNode} instances.
|
|
*/
|
|
public PublishSubject<FullNode> getNodeLatencyObservable(){
|
|
return fullNodePublishSubject;
|
|
}
|
|
|
|
public NodeLatencyVerifier getNodeLatencyVerifier(){ return nodeLatencyVerifier; }
|
|
}
|