JvmUsage.java

/**
 * Copyright 2016 Yahoo Inc.
 *
 * 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.yahoo.pulsar.common.policies.data.loadbalancer;

import java.util.Map;

/**
 * {@link JvmUsage} represents set of resources that are specific to JVM and are used by broker, load balancing need to
 * know this detail
 *
 */
public class JvmUsage {
    public long getThreadCount() {
        return threadCount;
    }

    public void setThreadCount(long threadCount) {
        this.threadCount = threadCount;
    }

    private Long threadCount;

    /*
     * factory method that returns a new instance of class by populating it from metrics, we assume that the metrics is
     * jvm metrics or
     *
     */
    public static JvmUsage populateFrom(Map<String, Object> metrics) {
        JvmUsage jvmUsage = null;
        if (metrics.containsKey("jvm_thread_cnt")) {
            jvmUsage = new JvmUsage();
            jvmUsage.threadCount = ((Long) metrics.get("jvm_thread_cnt")).longValue();
        }
        return jvmUsage;
    }
}