/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.activemq.transport.stomp;
import java.io.IOException;
import javax.jms.JMSException;
import org.apache.activemq.broker.BrokerContext;
import org.apache.activemq.command.Command;
import org.apache.activemq.transport.Transport;
import org.apache.activemq.transport.TransportFilter;
import org.apache.activemq.transport.TransportListener;
import org.apache.activemq.util.IOExceptionSupport;
import org.apache.activemq.wireformat.WireFormat;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* The StompTransportFilter normally sits on top of a TcpTransport that has been
* configured with the StompWireFormat and is used to convert STOMP commands to
* ActiveMQ commands. All of the conversion work is done by delegating to the
* ProtocolConverter.
*
* @author <a href="http://hiramchirino.com">chirino</a>
*/
public class StompTransportFilter extends TransportFilter implements StompTransport {
private static final Logger TRACE = LoggerFactory.getLogger(StompTransportFilter.class.getPackage().getName() + ".StompIO");
private final ProtocolConverter protocolConverter;
private StompInactivityMonitor monitor;
private StompWireFormat wireFormat;
private boolean trace;
public StompTransportFilter(Transport next, WireFormat wireFormat, BrokerContext brokerContext) {
super(next);
this.protocolConverter = new ProtocolConverter(this, brokerContext);
if (wireFormat instanceof StompWireFormat) {
this.wireFormat = (StompWireFormat) wireFormat;
}
}
@Override
public void start() throws Exception {
if (monitor != null) {
monitor.startConnectCheckTask(getConnectAttemptTimeout());
}
super.start();
}
@Override
public void oneway(Object o) throws IOException {
try {
final Command command = (Command) o;
protocolConverter.onActiveMQCommand(command);
} catch (JMSException e) {
throw IOExceptionSupport.create(e);
}
}
@Override
public void onCommand(Object command) {
try {
if (trace) {
TRACE.trace("Received: \n" + command);
}
protocolConverter.onStompCommand((StompFrame) command);
} catch (IOException e) {
onException(e);
} catch (JMSException e) {
onException(IOExceptionSupport.create(e));
}
}
@Override
public void sendToActiveMQ(Command command) {
TransportListener l = transportListener;
if (l != null) {
l.onCommand(command);
}
}
@Override
public void sendToStomp(StompFrame command) throws IOException {
if (trace) {
TRACE.trace("Sending: \n" + command);
}
Transport n = next;
if (n != null) {
n.oneway(command);
}
}
public boolean isTrace() {
return trace;
}
public void setTrace(boolean trace) {
this.trace = trace;
}
@Override
public StompInactivityMonitor getInactivityMonitor() {
return monitor;
}
public void setInactivityMonitor(StompInactivityMonitor monitor) {
this.monitor = monitor;
}
@Override
public StompWireFormat getWireFormat() {
return this.wireFormat;
}
public String getDefaultHeartBeat() {
return protocolConverter != null ? protocolConverter.getDefaultHeartBeat() : null;
}
public void setDefaultHeartBeat(String defaultHeartBeat) {
protocolConverter.setDefaultHeartBeat(defaultHeartBeat);
}
/**
* Returns the currently configured Read check grace period multiplier.
*
* @return the hbGracePeriodMultiplier
*/
public float getHbGracePeriodMultiplier() {
return protocolConverter != null ? protocolConverter.getHbGracePeriodMultiplier() : null;
}
/**
* Sets the read check grace period multiplier. New CONNECT frames that indicate a heart beat
* value with a read check interval will have that value multiplied by this value to add a
* grace period before the connection is considered invalid. By default this value is set to
* zero and no grace period is given. When set the value must be larger than 1.0 or it will
* be ignored.
*
* @param hbGracePeriodMultiplier the hbGracePeriodMultiplier to set
*/
public void setHbGracePeriodMultiplier(float hbGracePeriodMultiplier) {
if (hbGracePeriodMultiplier > 1.0f) {
protocolConverter.setHbGracePeriodMultiplier(hbGracePeriodMultiplier);
}
}
/**
* Sets the maximum number of bytes that the data portion of a STOMP frame is allowed to
* be, any incoming STOMP frame with a data section larger than this value will receive
* an error response.
*
* @param maxDataLength
* size in bytes of the maximum data portion of a STOMP frame.
*/
public void setMaxDataLength(int maxDataLength) {
wireFormat.setMaxDataLength(maxDataLength);
}
public int getMaxDataLength() {
return wireFormat.getMaxDataLength();
}
public void setMaxFrameSize(int maxFrameSize) {
wireFormat.setMaxFrameSize(maxFrameSize);
}
public long getMaxFrameSize() {
return wireFormat.getMaxFrameSize();
}
public long getConnectAttemptTimeout() {
return wireFormat.getConnectionAttemptTimeout();
}
public void setConnectAttemptTimeout(long timeout) {
wireFormat.setConnectionAttemptTimeout(timeout);
}
}