tribescontrolcommandprocessor.java

来自「开源的axis2框架的源码。用于开发WEBSERVER」· Java 代码 · 共 89 行

/*
 * 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.AckCommand;
import org.apache.axis2.clustering.control.ControlCommand;
import org.apache.axis2.clustering.control.GetStateCommand;
import org.apache.axis2.clustering.control.GetStateResponseCommand;
import org.apache.axis2.clustering.control.GetConfigurationCommand;
import org.apache.axis2.clustering.control.GetConfigurationResponseCommand;
import org.apache.axis2.context.ConfigurationContext;
import org.apache.catalina.tribes.Member;

/**
 * 
 */
public class TribesControlCommandProcessor {
    private ConfigurationContext configurationContext;

    private ChannelSender channelSender;

    public void setChannelSender(ChannelSender channelSender) {
        this.channelSender = channelSender;
    }

    public TribesControlCommandProcessor(ConfigurationContext configurationContext) {
        this.configurationContext = configurationContext;
    }

    public void setConfigurationContext(ConfigurationContext configurationContext) {
        this.configurationContext = configurationContext;
    }

    public void process(ControlCommand command, Member sender) throws ClusteringFault {

        if (command 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;
            }
            command.execute(configurationContext);
            GetStateResponseCommand getStateRespCmd = new GetStateResponseCommand();
            getStateRespCmd.setCommands(((GetStateCommand) command).getCommands());
            channelSender.sendToMember(getStateRespCmd, sender);
        } else if (command 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;
            }
            command.execute(configurationContext);
            GetConfigurationResponseCommand
                    getConfigRespCmd = new GetConfigurationResponseCommand();
            getConfigRespCmd.
                    setServiceGroups(((GetConfigurationCommand) command).getServiceGroupNames());
            channelSender.sendToMember(getConfigRespCmd, sender);
        } else if (command instanceof AckCommand) {
            AckCommand cmd = (AckCommand) command;
            cmd.setMemberId(TribesUtil.getHost(sender));
            cmd.execute(configurationContext);
        } else {
            command.execute(configurationContext);
        }
    }
}