Examples with RemoteProcessException org.apache.catalina.tribes.RemoteProcessException used on opensource projects

Example 1 with RemoteProcessException

use of org.apache.catalina.tribes.RemoteProcessException in project tomcat70 by apache.

the class NioReplicationTask method drainChannel.

/**
 * The actual code which drains the channel associated with
 * the given key.  This method assumes the key has been
 * modified prior to invocation to turn off selection
 * interest in OP_READ.  When this method completes it
 * re-enables OP_READ and calls wakeup() on the selector
 * so the selector will resume watching this channel.
 */
protected void drainChannel(final SelectionKey key, ObjectReader reader) throws Exception {
    reader.setLastAccess(System.currentTimeMillis());
    reader.access();
    ReadableByteChannel channel = (ReadableByteChannel) key.channel();
    int count = -1;
    // make buffer empty
    buffer.clear();
    SocketAddress saddr = null;
    if (channel instanceof SocketChannel) {
        // loop while data available, channel is non-blocking
        while ((count = channel.read(buffer)) > 0) {
            // make buffer readable
            buffer.flip();
            if (buffer.hasArray())
                reader.append(buffer.array(), 0, count, false);
            else
                reader.append(buffer, count, false);
            // make buffer empty
            buffer.clear();
            // do we have at least one package?
            if (reader.hasPackage())
                break;
        }
    } else if (channel instanceof DatagramChannel) {
        DatagramChannel dchannel = (DatagramChannel) channel;
        saddr = dchannel.receive(buffer);
        // make buffer readable
        buffer.flip();
        if (buffer.hasArray())
            reader.append(buffer.array(), 0, buffer.limit() - buffer.position(), false);
        else
            reader.append(buffer, buffer.limit() - buffer.position(), false);
        // make buffer empty
        buffer.clear();
        // did we get a package
        count = reader.hasPackage() ? 1 : -1;
    }
    int pkgcnt = reader.count();
    if (count < 0 && pkgcnt == 0) {
        // end of stream, and no more packages to process
        remoteEof(key);
        return;
    }
    ChannelMessage[] msgs = pkgcnt == 0 ? ChannelData.EMPTY_DATA_ARRAY : reader.execute();
    // register to read new data, before we send it off to avoid dead locks
    registerForRead(key, reader);
    for (int i = 0; i < msgs.length; i++) {
        /**
         * Use send ack here if you want to ack the request to the remote
         * server before completing the request
         * This is considered an asynchronous request
         */
        if (ChannelData.sendAckAsync(msgs[i].getOptions()))
            sendAck(key, (WritableByteChannel) channel, Constants.ACK_COMMAND, saddr);
        try {
            if (Logs.MESSAGES.isTraceEnabled()) {
                try {
                    Logs.MESSAGES.trace("NioReplicationThread - Received msg:" + new UniqueId(msgs[i].getUniqueId()) + " at " + new java.sql.Timestamp(System.currentTimeMillis()));
                } catch (Throwable t) {
                }
            }
            // process the message
            getCallback().messageDataReceived(msgs[i]);
            /**
             * Use send ack here if you want the request to complete on this
             * server before sending the ack to the remote server
             * This is considered a synchronized request
             */
            if (ChannelData.sendAckSync(msgs[i].getOptions()))
                sendAck(key, (WritableByteChannel) channel, Constants.ACK_COMMAND, saddr);
        } catch (RemoteProcessException e) {
            if (log.isDebugEnabled())
                log.error("Processing of cluster message failed.", e);
            if (ChannelData.sendAckSync(msgs[i].getOptions()))
                sendAck(key, (WritableByteChannel) channel, Constants.FAIL_ACK_COMMAND, saddr);
        } catch (Exception e) {
            log.error("Processing of cluster message failed.", e);
            if (ChannelData.sendAckSync(msgs[i].getOptions()))
                sendAck(key, (WritableByteChannel) channel, Constants.FAIL_ACK_COMMAND, saddr);
        }
        if (getUseBufferPool()) {
            BufferPool.getBufferPool().returnBuffer(msgs[i].getMessage());
            msgs[i].setMessage(null);
        }
    }
    if (count < 0) {
        remoteEof(key);
        return;
    }
}

Example 2 with RemoteProcessException

use of org.apache.catalina.tribes.RemoteProcessException in project tomcat70 by apache.

the class GroupChannel method messageReceived.

/**
 * Callback from the interceptor stack. <br>
 * When a message is received from a remote node, this method will be invoked by
 * the previous interceptor.<br>
 * This method can also be used to send a message to other components within the same application,
 * but its an extreme case, and you're probably better off doing that logic between the applications itself.
 * @param msg ChannelMessage
 */
@Override
public void messageReceived(ChannelMessage msg) {
    if (msg == null)
        return;
    try {
        if (Logs.MESSAGES.isTraceEnabled()) {
            Logs.MESSAGES.trace("GroupChannel - Received msg:" + new UniqueId(msg.getUniqueId()) + " at " + new java.sql.Timestamp(System.currentTimeMillis()) + " from " + msg.getAddress().getName());
        }
        Serializable fwd = null;
        if ((msg.getOptions() & SEND_OPTIONS_BYTE_MESSAGE) == SEND_OPTIONS_BYTE_MESSAGE) {
            fwd = new ByteMessage(msg.getMessage().getBytes());
        } else {
            try {
                fwd = XByteBuffer.deserialize(msg.getMessage().getBytesDirect(), 0, msg.getMessage().getLength());
            } catch (Exception sx) {
                log.error("Unable to deserialize message:" + msg, sx);
                return;
            }
        }
        if (Logs.MESSAGES.isTraceEnabled()) {
            Logs.MESSAGES.trace("GroupChannel - Receive Message:" + new UniqueId(msg.getUniqueId()) + " is " + fwd);
        }
        // get the actual member with the correct alive time
        Member source = msg.getAddress();
        boolean rx = false;
        boolean delivered = false;
        for (int i = 0; i < channelListeners.size(); i++) {
            ChannelListener channelListener = (ChannelListener) channelListeners.get(i);
            if (channelListener != null && channelListener.accept(fwd, source)) {
                channelListener.messageReceived(fwd, source);
                delivered = true;
                // is responsible for returning the reply, otherwise we send an absence reply
                if (channelListener instanceof RpcChannel)
                    rx = true;
            }
        }
        // for
        if ((!rx) && (fwd instanceof RpcMessage)) {
            // if we have a message that requires a response,
            // but none was given, send back an immediate one
            sendNoRpcChannelReply((RpcMessage) fwd, source);
        }
        if (Logs.MESSAGES.isTraceEnabled()) {
            Logs.MESSAGES.trace("GroupChannel delivered[" + delivered + "] id:" + new UniqueId(msg.getUniqueId()));
        }
    } catch (Exception x) {
        // as a warning.
        if (log.isWarnEnabled())
            log.warn("Error receiving message:", x);
        throw new RemoteProcessException("Exception:" + x.getMessage(), x);
    }
}

Example 3 with RemoteProcessException

use of org.apache.catalina.tribes.RemoteProcessException in project tomcat70 by apache.

the class BioSender method waitForAck.

/**
 * Wait for Acknowledgement from other server.
 * FIXME Please, not wait only for three characters, better control that the wait ack message is correct.
 * @throws java.io.IOException
 * @throws java.net.SocketTimeoutException
 */
protected void waitForAck() throws java.io.IOException {
    try {
        boolean ackReceived = false;
        boolean failAckReceived = false;
        ackbuf.clear();
        int bytesRead = 0;
        int i = soIn.read();
        while ((i != -1) && (bytesRead < Constants.ACK_COMMAND.length)) {
            bytesRead++;
            byte d = (byte) i;
            ackbuf.append(d);
            if (ackbuf.doesPackageExist()) {
                byte[] ackcmd = ackbuf.extractDataPackage(true).getBytes();
                ackReceived = Arrays.equals(ackcmd, org.apache.catalina.tribes.transport.Constants.ACK_DATA);
                failAckReceived = Arrays.equals(ackcmd, org.apache.catalina.tribes.transport.Constants.FAIL_ACK_DATA);
                ackReceived = ackReceived || failAckReceived;
                break;
            }
            i = soIn.read();
        }
        if (!ackReceived) {
            if (i == -1)
                throw new IOException(sm.getString("IDataSender.ack.eof", getAddress(), Integer.valueOf(socket.getLocalPort())));
            else
                throw new IOException(sm.getString("IDataSender.ack.wrong", getAddress(), Integer.valueOf(socket.getLocalPort())));
        } else if (failAckReceived && getThrowOnFailedAck()) {
            throw new RemoteProcessException("Received a failed ack:org.apache.catalina.tribes.transport.Constants.FAIL_ACK_DATA");
        }
    } catch (IOException x) {
        String errmsg = sm.getString("IDataSender.ack.missing", getAddress(), Integer.valueOf(socket.getLocalPort()), Long.valueOf(getTimeout()));
        if (SenderState.getSenderState(getDestination()).isReady()) {
            SenderState.getSenderState(getDestination()).setSuspect();
            if (log.isWarnEnabled())
                log.warn(errmsg, x);
        } else {
            if (log.isDebugEnabled())
                log.debug(errmsg, x);
        }
        throw x;
    } finally {
        ackbuf.clear();
    }
}

Example 4 with RemoteProcessException

use of org.apache.catalina.tribes.RemoteProcessException in project tomcat by apache.

the class NioReplicationTask method drainChannel.

/**
 * The actual code which drains the channel associated with
 * the given key.  This method assumes the key has been
 * modified prior to invocation to turn off selection
 * interest in OP_READ.  When this method completes it
 * re-enables OP_READ and calls wakeup() on the selector
 * so the selector will resume watching this channel.
 * @param key The key to process
 * @param reader The reader
 * @throws Exception IO error
 */
protected void drainChannel(final SelectionKey key, ObjectReader reader) throws Exception {
    reader.access();
    ReadableByteChannel channel = (ReadableByteChannel) key.channel();
    int count = -1;
    // make buffer empty
    buffer.clear();
    SocketAddress saddr = null;
    if (channel instanceof SocketChannel) {
        // loop while data available, channel is non-blocking
        while ((count = channel.read(buffer)) > 0) {
            // make buffer readable
            buffer.flip();
            if (buffer.hasArray()) {
                reader.append(buffer.array(), 0, count, false);
            } else {
                reader.append(buffer, count, false);
            }
            // make buffer empty
            buffer.clear();
            // do we have at least one package?
            if (reader.hasPackage()) {
                break;
            }
        }
    } else if (channel instanceof DatagramChannel) {
        DatagramChannel dchannel = (DatagramChannel) channel;
        saddr = dchannel.receive(buffer);
        // make buffer readable
        buffer.flip();
        if (buffer.hasArray()) {
            reader.append(buffer.array(), 0, buffer.limit() - buffer.position(), false);
        } else {
            reader.append(buffer, buffer.limit() - buffer.position(), false);
        }
        // make buffer empty
        buffer.clear();
        // did we get a package
        count = reader.hasPackage() ? 1 : -1;
    }
    int pkgcnt = reader.count();
    if (count < 0 && pkgcnt == 0) {
        // end of stream, and no more packages to process
        remoteEof(key);
        return;
    }
    ChannelMessage[] msgs = pkgcnt == 0 ? ChannelData.EMPTY_DATA_ARRAY : reader.execute();
    // register to read new data, before we send it off to avoid dead locks
    registerForRead(key, reader);
    for (ChannelMessage msg : msgs) {
        /**
         * Use send ack here if you want to ack the request to the remote
         * server before completing the request
         * This is considered an asynchronous request
         */
        if (ChannelData.sendAckAsync(msg.getOptions())) {
            sendAck(key, (WritableByteChannel) channel, Constants.ACK_COMMAND, saddr);
        }
        try {
            if (Logs.MESSAGES.isTraceEnabled()) {
                try {
                    Logs.MESSAGES.trace("NioReplicationThread - Received msg:" + new UniqueId(msg.getUniqueId()) + " at " + new java.sql.Timestamp(System.currentTimeMillis()));
                } catch (Throwable t) {
                }
            }
            // process the message
            getCallback().messageDataReceived(msg);
            /**
             * Use send ack here if you want the request to complete on this
             * server before sending the ack to the remote server
             * This is considered a synchronized request
             */
            if (ChannelData.sendAckSync(msg.getOptions())) {
                sendAck(key, (WritableByteChannel) channel, Constants.ACK_COMMAND, saddr);
            }
        } catch (RemoteProcessException e) {
            if (log.isDebugEnabled()) {
                log.error(sm.getString("nioReplicationTask.process.clusterMsg.failed"), e);
            }
            if (ChannelData.sendAckSync(msg.getOptions())) {
                sendAck(key, (WritableByteChannel) channel, Constants.FAIL_ACK_COMMAND, saddr);
            }
        } catch (Exception e) {
            log.error(sm.getString("nioReplicationTask.process.clusterMsg.failed"), e);
            if (ChannelData.sendAckSync(msg.getOptions())) {
                sendAck(key, (WritableByteChannel) channel, Constants.FAIL_ACK_COMMAND, saddr);
            }
        }
        if (getUseBufferPool()) {
            BufferPool.getBufferPool().returnBuffer(msg.getMessage());
            msg.setMessage(null);
        }
    }
    if (count < 0) {
        remoteEof(key);
    }
}

Example 5 with RemoteProcessException

use of org.apache.catalina.tribes.RemoteProcessException in project tomcat by apache.

the class GroupChannel method messageReceived.

/**
 * Callback from the interceptor stack. <br>
 * When a message is received from a remote node, this method will be
 * invoked by the previous interceptor.<br>
 * This method can also be used to send a message to other components
 * within the same application, but its an extreme case, and you're probably
 * better off doing that logic between the applications itself.
 * @param msg ChannelMessage
 */
@Override
public void messageReceived(ChannelMessage msg) {
    if (msg == null) {
        return;
    }
    try {
        if (Logs.MESSAGES.isTraceEnabled()) {
            Logs.MESSAGES.trace("GroupChannel - Received msg:" + new UniqueId(msg.getUniqueId()) + " at " + new java.sql.Timestamp(System.currentTimeMillis()) + " from " + msg.getAddress().getName());
        }
        Serializable fwd = null;
        if ((msg.getOptions() & SEND_OPTIONS_BYTE_MESSAGE) == SEND_OPTIONS_BYTE_MESSAGE) {
            fwd = new ByteMessage(msg.getMessage().getBytes());
        } else {
            try {
                fwd = XByteBuffer.deserialize(msg.getMessage().getBytesDirect(), 0, msg.getMessage().getLength());
            } catch (Exception sx) {
                log.error(sm.getString("groupChannel.unable.deserialize", msg), sx);
                return;
            }
        }
        if (Logs.MESSAGES.isTraceEnabled()) {
            Logs.MESSAGES.trace("GroupChannel - Receive Message:" + new UniqueId(msg.getUniqueId()) + " is " + fwd);
        }
        // get the actual member with the correct alive time
        Member source = msg.getAddress();
        boolean rx = false;
        boolean delivered = false;
        for (ChannelListener channelListener : channelListeners) {
            if (channelListener != null && channelListener.accept(fwd, source)) {
                channelListener.messageReceived(fwd, source);
                delivered = true;
                // is responsible for returning the reply, otherwise we send an absence reply
                if (channelListener instanceof RpcChannel) {
                    rx = true;
                }
            }
        }
        // for
        if ((!rx) && (fwd instanceof RpcMessage)) {
            // if we have a message that requires a response,
            // but none was given, send back an immediate one
            sendNoRpcChannelReply((RpcMessage) fwd, source);
        }
        if (Logs.MESSAGES.isTraceEnabled()) {
            Logs.MESSAGES.trace("GroupChannel delivered[" + delivered + "] id:" + new UniqueId(msg.getUniqueId()));
        }
    } catch (Exception x) {
        // as a warning.
        if (log.isWarnEnabled()) {
            log.warn(sm.getString("groupChannel.receiving.error"), x);
        }
        throw new RemoteProcessException(sm.getString("groupChannel.receiving.error"), x);
    }
}