org.apache.beam.runners.spark.aggregators.metrics.sink.InMemoryMetrics.java Source code

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Here is the source code for org.apache.beam.runners.spark.aggregators.metrics.sink.InMemoryMetrics.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 org.apache.beam.runners.spark.aggregators.metrics.sink;

import com.codahale.metrics.MetricFilter;
import com.codahale.metrics.MetricRegistry;
import com.google.common.base.Predicates;
import com.google.common.collect.Iterables;
import java.util.Properties;
import org.apache.beam.runners.spark.metrics.WithMetricsSupport;
import org.apache.spark.metrics.sink.Sink;

/**
 * An in-memory {@link Sink} implementation for tests.
 */
public class InMemoryMetrics implements Sink {

    private static WithMetricsSupport extendedMetricsRegistry;
    private static MetricRegistry internalMetricRegistry;

    @SuppressWarnings("UnusedParameters")
    public InMemoryMetrics(final Properties properties, final MetricRegistry metricRegistry,
            final org.apache.spark.SecurityManager securityMgr) {
        extendedMetricsRegistry = WithMetricsSupport.forRegistry(metricRegistry);
        internalMetricRegistry = metricRegistry;
    }

    @SuppressWarnings({ "unchecked", "WeakerAccess" })
    public static <T> T valueOf(final String name) {
        final T retVal;

        // this might fail in case we have multiple aggregators with the same suffix after
        // the last dot, but it should be good enough for tests.
        if (extendedMetricsRegistry != null && Iterables.any(extendedMetricsRegistry.getGauges().keySet(),
                Predicates.containsPattern(name + "$"))) {
            String key = Iterables.find(extendedMetricsRegistry.getGauges().keySet(),
                    Predicates.containsPattern(name + "$"));
            retVal = (T) extendedMetricsRegistry.getGauges().get(key).getValue();
        } else {
            retVal = null;
        }

        return retVal;
    }

    @SuppressWarnings("WeakerAccess")
    public static void clearAll() {
        if (internalMetricRegistry != null) {
            internalMetricRegistry.removeMatching(MetricFilter.ALL);
        }
    }

    @Override
    public void start() {

    }

    @Override
    public void stop() {

    }

    @Override
    public void report() {

    }

}