com.continuuity.weave.internal.DefaultResourceReport.java Source code

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Here is the source code for com.continuuity.weave.internal.DefaultResourceReport.java

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/*
 * Copyright 2012-2013 Continuuity,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.continuuity.weave.internal;

import com.continuuity.weave.api.ResourceReport;
import com.continuuity.weave.api.WeaveRunResources;
import com.google.common.collect.HashMultimap;
import com.google.common.collect.Multimaps;
import com.google.common.collect.SetMultimap;

import java.util.Collection;
import java.util.Map;

/**
 * Implementation of {@link com.continuuity.weave.api.ResourceReport} with some
 * additional methods for maintaining the report.
 */
public final class DefaultResourceReport implements ResourceReport {
    private final SetMultimap<String, WeaveRunResources> usedResources;
    private final WeaveRunResources appMasterResources;
    private final String applicationId;

    public DefaultResourceReport(String applicationId, WeaveRunResources masterResources) {
        this.applicationId = applicationId;
        this.appMasterResources = masterResources;
        this.usedResources = HashMultimap.create();
    }

    public DefaultResourceReport(String applicationId, WeaveRunResources masterResources,
            Map<String, Collection<WeaveRunResources>> resources) {
        this.applicationId = applicationId;
        this.appMasterResources = masterResources;
        this.usedResources = HashMultimap.create();
        for (Map.Entry<String, Collection<WeaveRunResources>> entry : resources.entrySet()) {
            this.usedResources.putAll(entry.getKey(), entry.getValue());
        }
    }

    /**
     * Add resources used by an instance of the runnable.
     *
     * @param runnableName name of runnable.
     * @param resources resources to add.
     */
    public void addRunResources(String runnableName, WeaveRunResources resources) {
        usedResources.put(runnableName, resources);
    }

    /**
     * Remove the resource corresponding to the given runnable and container.
     *
     * @param runnableName name of runnable.
     * @param containerId container id of the runnable.
     */
    public void removeRunnableResources(String runnableName, String containerId) {
        WeaveRunResources toRemove = null;
        // could be faster if usedResources was a Table, but that makes returning the
        // report a little more complex, and this does not need to be terribly fast.
        for (WeaveRunResources resources : usedResources.get(runnableName)) {
            if (resources.getContainerId().equals(containerId)) {
                toRemove = resources;
                break;
            }
        }
        usedResources.remove(runnableName, toRemove);
    }

    /**
     * Get all the run resources being used by all instances of the specified runnable.
     *
     * @param runnableName the runnable name.
     * @return resources being used by all instances of the runnable.
     */
    @Override
    public Collection<WeaveRunResources> getRunnableResources(String runnableName) {
        return usedResources.get(runnableName);
    }

    /**
     * Get all the run resources being used across all runnables.
     *
     * @return all run resources used by all instances of all runnables.
     */
    @Override
    public Map<String, Collection<WeaveRunResources>> getResources() {
        return Multimaps.unmodifiableSetMultimap(usedResources).asMap();
    }

    /**
     * Get the resources application master is using.
     *
     * @return resources being used by the application master.
     */
    @Override
    public WeaveRunResources getAppMasterResources() {
        return appMasterResources;
    }

    /**
     * Get the id of the application master.
     *
     * @return id of the application master.
     */
    @Override
    public String getApplicationId() {
        return applicationId;
    }
}