samza-rest/src/main/java/org/apache/samza/rest/script/ScriptOutputHandler.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.samza.rest.script;

import java.io.IOException;
import java.io.InputStream;


/**
 * A script output handler processes the stream of output from the stdout and stderr channels of a script.
 */
public interface ScriptOutputHandler {

  /**
   * Processes the script output represented by the InputStream.
   *
   * Implementations must fully process the stream or the script may hang.
   *
   * @param output the stream of output from the script.
   * @throws IOException if there are problems reading the output.
   */
  void processScriptOutput(InputStream output)
      throws IOException;
}