org.apache.druid.java.util.emitter.service.ServiceEmitter.java Source code

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Here is the source code for org.apache.druid.java.util.emitter.service.ServiceEmitter.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.druid.java.util.emitter.service;

import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableMap;
import org.apache.druid.java.util.common.lifecycle.LifecycleStart;
import org.apache.druid.java.util.common.lifecycle.LifecycleStop;
import org.apache.druid.java.util.emitter.core.Emitter;
import org.apache.druid.java.util.emitter.core.Event;

import java.io.IOException;

public class ServiceEmitter implements Emitter {
    private final ImmutableMap<String, String> serviceDimensions;
    private final Emitter emitter;

    public ServiceEmitter(String service, String host, Emitter emitter) {
        this(service, host, emitter, ImmutableMap.of());
    }

    public ServiceEmitter(String service, String host, Emitter emitter,
            ImmutableMap<String, String> otherServiceDimensions) {
        this.serviceDimensions = ImmutableMap.<String, String>builder()
                .put("service", Preconditions.checkNotNull(service)).put("host", Preconditions.checkNotNull(host))
                .putAll(otherServiceDimensions).build();
        this.emitter = emitter;
    }

    @Override
    @LifecycleStart
    public void start() {
        emitter.start();
    }

    @Override
    public void emit(Event event) {
        emitter.emit(event);
    }

    public void emit(ServiceEventBuilder builder) {
        emit(builder.build(serviceDimensions));
    }

    @Override
    public void flush() throws IOException {
        emitter.flush();
    }

    @Override
    @LifecycleStop
    public void close() throws IOException {
        emitter.close();
    }

    @Override
    public String toString() {
        return "ServiceEmitter{" + "serviceDimensions=" + serviceDimensions + ", emitter=" + emitter + '}';
    }
}