/**
* 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;
import java.io.IOException;
import java.net.URI;
import org.apache.activemq.util.ServiceSupport;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* A useful base class for transport implementations.
*
*
*/
public abstract class TransportSupport extends ServiceSupport implements Transport {
private static final Logger LOG = LoggerFactory.getLogger(TransportSupport.class);
TransportListener transportListener;
/**
* Returns the current transport listener
*/
public TransportListener getTransportListener() {
return transportListener;
}
/**
* Registers an inbound command listener
*
* @param commandListener
*/
public void setTransportListener(TransportListener commandListener) {
this.transportListener = commandListener;
}
/**
* narrow acceptance
*
* @param target
* @return 'this' if assignable
*/
public <T> T narrow(Class<T> target) {
boolean assignableFrom = target.isAssignableFrom(getClass());
if (assignableFrom) {
return target.cast(this);
}
return null;
}
public FutureResponse asyncRequest(Object command, ResponseCallback responseCallback) throws IOException {
throw new AssertionError("Unsupported Method");
}
public Object request(Object command) throws IOException {
throw new AssertionError("Unsupported Method");
}
public Object request(Object command, int timeout) throws IOException {
throw new AssertionError("Unsupported Method");
}
/**
* Process the inbound command
*/
public void doConsume(Object command) {
if (command != null) {
if (transportListener != null) {
transportListener.onCommand(command);
} else {
LOG.error("No transportListener available to process inbound command: " + command);
}
}
}
/**
* Passes any IO exceptions into the transport listener
*/
public void onException(IOException e) {
if (transportListener != null) {
try {
transportListener.onException(e);
} catch (RuntimeException e2) {
// Handle any unexpected runtime exceptions by debug logging
// them.
LOG.debug("Unexpected runtime exception: " + e2, e2);
}
}
}
protected void checkStarted() throws IOException {
if (!isStarted()) {
throw new IOException("The transport is not running.");
}
}
public boolean isFaultTolerant() {
return false;
}
public void reconnect(URI uri) throws IOException {
throw new IOException("Not supported");
}
public boolean isReconnectSupported() {
return false;
}
public boolean isUpdateURIsSupported() {
return false;
}
public void updateURIs(boolean reblance,URI[] uris) throws IOException {
throw new IOException("Not supported");
}
public boolean isDisposed() {
return isStopped();
}
public boolean isConnected() {
return isStarted();
}
}