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Clustering module for QWAZR
There is a newer version: 1.5.2
/*
 * Copyright 2015-2017 Emmanuel Keller / QWAZR
 * 
 * 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.qwazr.cluster;

import com.qwazr.server.AbstractServiceImpl;
import com.qwazr.server.ServerException;
import com.qwazr.utils.LoggerUtils;

import javax.ws.rs.NotAcceptableException;
import java.util.SortedMap;
import java.util.SortedSet;
import java.util.TreeSet;
import java.util.logging.Logger;

class ClusterServiceImpl extends AbstractServiceImpl implements ClusterServiceInterface {

	private final static Logger LOGGER = LoggerUtils.getLogger(ClusterServiceImpl.class);

	final ClusterManager manager;

	public ClusterServiceImpl(final ClusterManager manager) {
		this.manager = manager;
	}

	@Override
	public ClusterStatusJson getStatus() {
		try {
			return manager.getStatus();
		} catch (ServerException e) {
			throw e.warnIfCause(LOGGER).getJsonException(false);
		}
	}

	@Override
	public SortedSet getNodes() {
		try {
			return new TreeSet<>(manager.getNodes());
		} catch (ServerException e) {
			throw e.warnIfCause(LOGGER).getJsonException(false);
		}
	}

	@Override
	public SortedSet getActiveNodesByService(final String serviceName, final String group) {
		try {
			if (serviceName == null)
				throw new NotAcceptableException();
			return manager.getNodesByGroupByService(group, serviceName);
		} catch (Exception e) {
			throw ServerException.getJsonException(LOGGER, e);
		}
	}

	@Override
	public String getActiveNodeRandomByService(final String serviceName, final String group) {
		try {
			if (serviceName == null)
				throw new NotAcceptableException();
			return manager.getRandomNode(group, serviceName);
		} catch (Exception e) {
			throw ServerException.getTextException(LOGGER, e);
		}
	}

	@Override
	public String getActiveNodeLeaderByService(final String serviceName, final String group) {
		try {
			if (serviceName == null)
				throw new NotAcceptableException();
			return manager.getLeaderNode(group, serviceName);
		} catch (ServerException e) {
			throw ServerException.getTextException(LOGGER, e);
		}
	}

	@Override
	public SortedMap getServiceMap(final String group) {
		try {
			return manager.getServicesStatus(group);
		} catch (ServerException e) {
			throw ServerException.getTextException(LOGGER, e);
		}
	}

	@Override
	public ClusterServiceStatusJson getServiceStatus(final String serviceName, final String group) {
		try {
			return manager.getServiceStatus(group, serviceName);
		} catch (ServerException e) {
			throw ServerException.getTextException(LOGGER, e);
		}
	}

	@Override
	public boolean equals(Object o) {
		if (o == null)
			return false;
		if (o == this)
			return true;
		if (o instanceof ClusterServiceImpl)
			return manager.nodeLiveId.equals(((ClusterServiceImpl) o).manager.nodeLiveId);
		if (o instanceof ClusterSingleClient)
			return manager.me.httpAddressKey.equals(((ClusterSingleClient) o).serverAddress);
		return false;
	}

}