modules/clustering/src/org/apache/axis2/clustering/tribes/RpcMessagingHandler.java

/*
 * 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.ClusteringFault;
import org.apache.axis2.clustering.ClusteringMessage;
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 messages from members
 */
public class RpcMessagingHandler implements RpcCallback {

    private static Log log = LogFactory.getLog(RpcMessagingHandler.class);

    private ConfigurationContext configurationContext;

    public RpcMessagingHandler(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("RPC request received by RpcMessagingHandler");
        }
        if (msg instanceof ClusteringMessage) {
            ClusteringMessage clusteringMsg = (ClusteringMessage) msg;
            try {
                clusteringMsg.execute(configurationContext);
            } catch (ClusteringFault e) {
                String errMsg = "Cannot handle RPC message";
                log.error(errMsg, e);
                throw new RemoteProcessException(errMsg, e);
            }
            return clusteringMsg.getResponse();
        } else {
            throw new IllegalArgumentException("Invalid RPC message of type " + msg.getClass() +
                                               " received");
        }
    }

    public void leftOver(Serializable msg, Member member) {
        //TODO: Method implementation
    }
}