com.metamx.metrics.CompoundMonitor.java Source code

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Here is the source code for com.metamx.metrics.CompoundMonitor.java

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/*
 * Copyright 2012 Metamarkets Group 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.metamx.metrics;

import com.google.common.base.Function;
import com.google.common.collect.Lists;
import com.metamx.emitter.service.ServiceEmitter;

import java.util.Arrays;
import java.util.List;

public abstract class CompoundMonitor implements Monitor {
    private final List<Monitor> monitors;

    public CompoundMonitor(List<Monitor> monitors) {
        this.monitors = monitors;
    }

    public CompoundMonitor(Monitor... monitors) {
        this(Arrays.asList(monitors));
    }

    @Override
    public void start() {
        for (Monitor monitor : monitors) {
            monitor.start();
        }
    }

    @Override
    public void stop() {
        for (Monitor monitor : monitors) {
            monitor.stop();
        }
    }

    @Override
    public boolean monitor(final ServiceEmitter emitter) {
        return shouldReschedule(Lists.transform(monitors, new Function<Monitor, Boolean>() {
            @Override
            public Boolean apply(Monitor monitor) {
                return monitor.monitor(emitter);
            }
        }));
    }

    public abstract boolean shouldReschedule(List<Boolean> reschedules);
}