edu.nwpu.gemfire.monitor.service.ClusterGCPausesService.java Source code

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Here is the source code for edu.nwpu.gemfire.monitor.service.ClusterGCPausesService.java

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/*
 *
 * 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 edu.nwpu.gemfire.monitor.service;

import javax.servlet.http.HttpServletRequest;

import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ArrayNode;
import com.fasterxml.jackson.databind.node.ObjectNode;

import edu.nwpu.gemfire.monitor.data.Cluster;
import edu.nwpu.gemfire.monitor.data.Repository;

/**
 * Class ClusterGCPausesService
 * 
 * This class contains implementations of getting Cluster's GC Pauses (JVM
 * Pauses) Details and its trend over the time.
 * 
 * @author Anchal G
 * @since version 7.5
 */

@Component
@Service("ClusterJVMPauses")
@Scope("singleton")
public class ClusterGCPausesService implements PulseService {

    private final ObjectMapper mapper = new ObjectMapper();

    public ObjectNode execute(final HttpServletRequest request) throws Exception {

        // get cluster object
        Cluster cluster = Repository.get().getCluster();

        // json object to be sent as response
        ObjectNode responseJSON = mapper.createObjectNode();
        // cluster's GC Pauses trend added to json response object

        ArrayNode pauses = mapper.createArrayNode();
        for (Object obj : cluster.getStatisticTrend(Cluster.CLUSTER_STAT_GARBAGE_COLLECTION)) {
            if (obj instanceof Number) {
                pauses.add(((Number) obj).longValue());
            }
        }
        responseJSON.put("currentGCPauses", cluster.getGarbageCollectionCount());
        responseJSON.put("gCPausesTrend", pauses);
        // Send json response
        return responseJSON;
    }
}