android asmack 重连分析

在做asmack的时候，发现有重连机制，分析了一下。

1、设置重连属性

ConnectionConfiguration.setReconnectionAllowed(boolean isAllowed)

 

public void setReconnectionAllowed(boolean isAllowed) {
        this.reconnectionAllowed = isAllowed;

设置属性后，再调用这个方法是，查看是否重连
    public boolean isReconnectionAllowed() {
        return this.reconnectionAllowed;
    }

 

 

2、在什么时候重连

connectionClosedOnError

parsePackets(Thread thread)

 

 

 

 

protected void reconnect() {
        if (this.isReconnectionAllowed()) {
            // Since there is no thread running, creates a new one to attempt
            // the reconnection.
            Thread reconnectionThread = new Thread() {

                /**
                 * Holds the current number of reconnection attempts
                 */
                private int attempts = 0;

                /**
                 * Returns the number of seconds until the next reconnection attempt.
                 *这个地方值得学习啊
                 * @return the number of seconds until the next reconnection attempt.
                 */
                private int timeDelay() {
                    if (attempts > 13) {
                        return 60 * 5;      // 5 minutes
                    }
                    if (attempts > 7) {
                        return 60;          // 1 minute
                    }
                    return 10;              // 10 seconds
                }

                /**
                 * The process will try the reconnection until the connection succeed or the user
                 * cancell it
                 */
                public void run() {
                    // The process will try to reconnect until the connection is established or
                    // the user cancel the reconnection process {@link Connection#disconnect()}
                    while (ReconnectionManager.this.isReconnectionAllowed()) {
                        // Find how much time we should wait until the next reconnection
                        int remainingSeconds = timeDelay();
                        // Sleep until we're ready for the next reconnection attempt. Notify
                        // listeners once per second about how much time remains before the next
                        // reconnection attempt.
                        while (ReconnectionManager.this.isReconnectionAllowed() &&
                                remainingSeconds > 0)
                        {
                            try {
                                Thread.sleep(1000);
                                remainingSeconds--;
                                ReconnectionManager.this
                                        .notifyAttemptToReconnectIn(remainingSeconds);
                            }
                            catch (InterruptedException e1) {
                                e1.printStackTrace();
                                // Notify the reconnection has failed
                                ReconnectionManager.this.notifyReconnectionFailed(e1);
                            }
                        }

                        // Makes a reconnection attempt
                        try {
                            if (ReconnectionManager.this.isReconnectionAllowed()) {
                                connection.connect();
                            }
                        }
                        catch (XMPPException e) {
                            // Fires the failed reconnection notification
                            ReconnectionManager.this.notifyReconnectionFailed(e);
                        }
                    }
                }
            };
            reconnectionThread.setName("Smack Reconnection Manager");
            reconnectionThread.setDaemon(true);
            reconnectionThread.start();
        }
    }