com.turbospaces.monitor.services.GroupDiscoveryService.java Source code

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Here is the source code for com.turbospaces.monitor.services.GroupDiscoveryService.java

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/**
 * Copyright (C) 2011-2012 Andrey Borisov <aandrey.borisov@gmail.com>
 *
 * Licensed 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 com.turbospaces.monitor.services;

import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;

import org.jgroups.JChannel;
import org.jgroups.stack.ProtocolStack;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.io.ClassPathResource;

/**
 * responsible for managing jgroups connections
 * 
 * @since 0.1
 */
@SuppressWarnings("javadoc")
public class GroupDiscoveryService {
    private final Logger logger = LoggerFactory.getLogger(getClass());
    private final Map<String, JChannel> channels = new HashMap<String, JChannel>();

    public synchronized JChannel connect(final String group, final byte[] bytes) throws Exception {
        JChannel jChannel = channels.get(group);
        if (jChannel == null || bytes != null) {
            ClassPathResource resource = new ClassPathResource("udp-largecluster.xml");
            InputStream inputStream = resource.getInputStream();
            jChannel = new JChannel(inputStream);
            inputStream.close();
            if (bytes != null) {
                ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(bytes);
                jChannel = new JChannel(byteArrayInputStream);
                byteArrayInputStream.close();
            }
            jChannel.setDiscardOwnMessages(true);
            ProtocolStack protocolStack = jChannel.getProtocolStack();
            protocolStack.getTransport().setValue("enable_diagnostics", false);
            logger.info("joining network group {}", group);
            jChannel.connect(group);
            channels.put(group, jChannel);
        }

        return jChannel;
    }
}