/*
* 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.axis2.clustering.tribes;
import org.apache.axis2.clustering.ClusteringConstants;
import org.apache.axis2.clustering.ClusteringFault;
import org.apache.axis2.clustering.control.GetConfigurationCommand;
import org.apache.axis2.clustering.control.GetConfigurationResponseCommand;
import org.apache.axis2.clustering.control.GetStateCommand;
import org.apache.axis2.clustering.control.GetStateResponseCommand;
import org.apache.axis2.context.ConfigurationContext;
import org.apache.catalina.tribes.Member;
import org.apache.catalina.tribes.RemoteProcessException;
import org.apache.catalina.tribes.group.RpcCallback;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import java.io.Serializable;
/**
* Handles RPC initialization requests from members
*/
public class RpcInitializationRequestHandler implements RpcCallback {
private static Log log = LogFactory.getLog(RpcInitializationRequestHandler.class);
private ConfigurationContext configurationContext;
public RpcInitializationRequestHandler(ConfigurationContext configurationContext) {
this.configurationContext = configurationContext;
}
public void setConfigurationContext(ConfigurationContext configurationContext) {
this.configurationContext = configurationContext;
}
public Serializable replyRequest(Serializable msg, Member invoker) {
if (log.isDebugEnabled()) {
log.debug("Initialization request received by RpcInitializationRequestHandler");
}
if (msg instanceof GetStateCommand) {
// If a GetStateRequest is received by a node which has not yet initialized
// this node cannot send a response to the state requester. So we simply return.
if (configurationContext.
getPropertyNonReplicable(ClusteringConstants.CLUSTER_INITIALIZED) == null) {
return null;
}
try {
log.info("Received " + msg + " initialization request message from " +
TribesUtil.getName(invoker));
GetStateCommand command = (GetStateCommand) msg;
command.execute(configurationContext);
GetStateResponseCommand getStateRespCmd = new GetStateResponseCommand();
getStateRespCmd.setCommands(command.getCommands());
return getStateRespCmd;
} catch (ClusteringFault e) {
String errMsg = "Cannot handle initialization request";
log.error(errMsg, e);
throw new RemoteProcessException(errMsg, e);
}
} else if (msg instanceof GetConfigurationCommand) {
// If a GetConfigurationCommand is received by a node which has not yet initialized
// this node cannot send a response to the state requester. So we simply return.
if (configurationContext.
getPropertyNonReplicable(ClusteringConstants.CLUSTER_INITIALIZED) == null) {
return null;
}
try {
log.info("Received " + msg + " initialization request message from " +
TribesUtil.getName(invoker));
GetConfigurationCommand command = (GetConfigurationCommand) msg;
command.execute(configurationContext);
GetConfigurationResponseCommand
getConfigRespCmd = new GetConfigurationResponseCommand();
getConfigRespCmd.setServiceGroups(command.getServiceGroupNames());
return getConfigRespCmd;
} catch (ClusteringFault e) {
String errMsg = "Cannot handle initialization request";
log.error(errMsg, e);
throw new RemoteProcessException(errMsg, e);
}
}
return null;
}
public void leftOver(Serializable msg, Member member) {
//TODO: Method implementation
}
}