TSDRMetricRecordBuilderContainer.java

/*
 * Copyright (c) 2015 Cisco Systems, Inc. and others.  All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */
package org.opendaylight.tsdr.osc;

import java.util.HashSet;
import java.util.Set;

import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.config.tsdr.collector.spi.rev150915.inserttsdrmetricrecord.input.TSDRMetricRecordBuilder;

/**
 * @author Sharon Aicler(saichler@gmail.com)
 **/
// This container aggregate several metrics builders that correlate to the same
// InstanceIdentifier.
// It has an array of builders that their metric value is update by notification
// the class assums that the order of initially adding the different metrics to
// the container
// is also kept during update so it the metrics were added as "A,B,C" to the
// container
// the place in the array will be 0,1,2 so when updating metric A you need to
// update builder[0] & so on...
public class TSDRMetricRecordBuilderContainer {
    // An array of metric record builders
    private TSDRMetricRecordBuilder[] builders = new TSDRMetricRecordBuilder[0];
    // A set to make sure the same metric is not been added twice.
    private Set<String> metricNames = new HashSet<String>();

    /*
     * Happens only once per metric path+type, a new builder is added to be the
     * cache for this metric type
     */
    public void addBuilder(TSDRMetricRecordBuilder builder) {
        synchronized (this) {
            if (!metricNames.contains(builder.getMetricName())) {
                metricNames.add(builder.getMetricName());
                TSDRMetricRecordBuilder temp[] = new TSDRMetricRecordBuilder[builders.length + 1];
                System.arraycopy(builders, 0, temp, 0, builders.length);
                temp[builders.length] = builder;
                builders = temp;
            }
        }
    }

    // Return the array of builders for the update operations following
    // notifications
    public TSDRMetricRecordBuilder[] getBuilders() {
        return this.builders;
    }
}