/*
* 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.isis.runtimes.dflt.remoting.common.client;
import java.io.IOException;
import org.apache.log4j.Logger;
import org.apache.isis.runtimes.dflt.remoting.common.IsisRemoteException;
import org.apache.isis.runtimes.dflt.remoting.common.exchange.Request;
import org.apache.isis.runtimes.dflt.remoting.common.exchange.ResponseEnvelope;
import org.apache.isis.runtimes.dflt.remoting.common.marshalling.ClientMarshaller;
import org.apache.isis.runtimes.dflt.remoting.transport.ConnectionException;
import org.apache.isis.runtimes.dflt.runtime.persistence.ConcurrencyException;
/**
* Default implementation of {@link ClientConnection} that delegates to
* {@link ClientMarshaller} supplied in {@link ClientConnectionDefault
* constructor}.
*/
public class ClientConnectionDefault implements ClientConnection {
@SuppressWarnings("unused")
private static final Logger LOG = Logger.getLogger(ClientConnectionDefault.class);
private final ClientMarshaller marshaller;
// ////////////////////////////////////////////////////////
// Constructor
// ////////////////////////////////////////////////////////
public ClientConnectionDefault(final ClientMarshaller marshaller) {
this.marshaller = marshaller;
}
protected ClientMarshaller getMarshaller() {
return marshaller;
}
// ////////////////////////////////////////////////////////
// init, shutdown
// ////////////////////////////////////////////////////////
@Override
public void init() {
marshaller.init();
}
@Override
public void shutdown() {
marshaller.shutdown();
}
// ////////////////////////////////////////////////////////
// reconnect, connect, disconnect
// ////////////////////////////////////////////////////////
private void connect() {
try {
marshaller.connect();
} catch (final IOException e) {
throw new ConnectionException("Connection failure", e);
}
}
private void disconnect() {
marshaller.disconnect();
}
// ////////////////////////////////////////////////////////
// executeRemotely
// ////////////////////////////////////////////////////////
@Override
public ResponseEnvelope executeRemotely(final Request request) {
connect();
try {
return executeRemotelyElseException(request);
} catch (final IOException e) {
throw new ConnectionException("Failed request", e);
} finally {
disconnect();
}
}
private ResponseEnvelope executeRemotelyElseException(final Request request) throws IOException {
final Object response = marshaller.request(request);
if (response instanceof ConcurrencyException) {
throw (ConcurrencyException) response;
} else if (response instanceof Exception) {
throw new IsisRemoteException("Exception occurred on server", (Throwable) response);
} else {
return (ResponseEnvelope) response;
}
}
}