从Java应用程序启动Flume Agent

Question

我已经编写了一个Java应用程序，它可以构建flume配置文件，并将它们写入Linux机器上的磁盘。然后，应用程序构建flume命令，并尝试通过运行以下代码中的命令来启动flume代理:

  try {
                    Process p = Runtime.getRuntime().exec(flumeStartCommand.toString());
                    p.waitFor(); 
                    BufferedReader in = new BufferedReader(new InputStreamReader(p.getInputStream()));
                    String line = null;
                    while ((line = in.readLine()) != null) {
                        System.out.println(line);
                    }                       

如果我接受flume命令并通过终端手动执行它，它工作得很好。当java应用程序尝试执行flume命令时，什么都没有发生。这是类路径问题吗？

Flume Command here： /root/flume-flume-flume-1.6/flume-ng-dist/target/apache-flume-1.6.0-SNAPSHOT-bin/apache-flume-1.6.0-SNAPSHOT-bin/bin/flume-ng agent --conf conf --conf-file /root/flumeconfs/ConsumerGroup4.conf --name Agent_ConsumerGroup4 -Dflume.root.logger=INFO，console -Dflume.monitoring.type=http -Dflume.monitoring.port=34548

我知道嵌入式代理是另一种选择，但这些只适用于avro接收器，对我来说不是很有用。感谢任何想法。干杯，科尔曼

Answer 1

对于任何试图理解这一点的人来说，flume命令需要被分解成字符串数组中的参数，如下所示:

String[] flumeCommand = new String[]{"/root/flume-flume-1.6/flume-ng-dist/target/apache-flume-1.6.0-SNAPSHOT-bin/apache-flume-1.6.0-SNAPSHOT-bin/bin/flume-ng",
                                   "agent",
                                   "--conf",
                                   "conf",
                                   "--conf-file",
                                   _flumeConfigurationDir+Active.getFlumeConfName(),
                                   "--name",
                                   Active.getFlumeAgentName(),
                                   "-Dflume.root.logger=INFO,console",
                                   "-Dflume.monitoring.type=http",
                                   "-Dflume.monitoring.port="+Active.getFlumeMetricsPort(),
};

然后使用以下代码：

ProcessBuilder flumeCommandBuilder = new ProcessBuilder(flumeCommand);
File flumeConfigurationDirFile = new File(_flumeConfigurationDir);
flumeCommandBuilder.directory(flumeConfigurationDirFile);                       
System.out.println("Working Directory: "+ flumeCommandBuilder.directory());
flumeCommandBuilder.redirectErrorStream(true);
Process process = flumeCommandBuilder.start();
BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
String line;
while ((line = reader.readLine()) != null)
    System.out.println("tasklist: " + line);