heron/metricsmgr/src/java/org/apache/heron/metricsmgr/MetricsUtil.java

/**
 * 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.heron.metricsmgr;

import org.apache.heron.spi.metricsmgr.metrics.MetricsRecord;

public final class MetricsUtil {

  private static final String SOURCE_DELIMITER = "/";

  private static final String SOURCE_FORMAT = "%s:%d/%s/%s";

  static String createSource(String host, int port, String component, String instance) {
    return String.format(SOURCE_FORMAT, host, port, component, instance);
  }

  /**
   * The format of source is "host:port/componentName/instanceId"
   * So splitting the source would be an array with 3 elements:
   * ["host:port", componentName, instanceId]
   * @param record
   * @return the split record source
   */
  public static String[] splitRecordSource(MetricsRecord record) {
    return record.getSource().split(SOURCE_DELIMITER);
  }

  private MetricsUtil() {
  }
}