uima-ducc-agent/src/main/java/org/apache/uima/ducc/agent/launcher/CommandBuilder.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.uima.ducc.agent.launcher;

import org.apache.uima.ducc.common.utils.Utils;
import org.apache.uima.ducc.transport.cmdline.ICommandLine;
import org.apache.uima.internal.util.ArrayUtils;

public class CommandBuilder {

  private static final String ducclingPath = Utils.resolvePlaceholderIfExists(
          System.getProperty("ducc.agent.launcher.ducc_spawn_path"), System.getProperties());

  public CommandBuilder() {

  }

  private static boolean useDuccling(ManagedProcess process) {
    if (process.isAgentProcess() || Utils.isWindows()) {
      return false;
    }
    // On non-windows check if we should spawn the process via ducc_ling
    String useDuccling = System.getProperty("ducc.agent.launcher.use.ducc_spawn");
    return ("true".equalsIgnoreCase(useDuccling) ? true : false);
  }

  public static String[] deployableStopCommand(ICommandLine cmdLine, ManagedProcess process) {
    String[] cmd;
    // Duccling, with no logging, always run by ducc, no need for
    // workingdir
    String[] ducclingNolog = new String[] { ducclingPath, "-u", process.getOwner(), "--" };

    if (useDuccling(process)) {
      cmd = (String[]) ArrayUtils.combine(ducclingNolog, (String[]) ArrayUtils
              .combine(new String[] { cmdLine.getExecutable() }, cmdLine.getCommandLine()));
    } else {
      cmd = (String[]) ArrayUtils.combine(new String[] { cmdLine.getExecutable() },
              cmdLine.getCommandLine());
    }
    return cmd;
  }
}