{"action":"created","comment":{"url":"https://api.github.com/repos/GoogleCloudPlatform/app-tools-lib-for-java/pulls/comments/63199235","id":63199235,"diff_hunk":"@@ -124,49 +133,79 @@ public void setStdErrLineListener(ProcessOutputLineListener stdErrLineListener)\n   /**\n    * Sets the subprocess exit listener for collecting the exit code of the subprocess.\n    *\n-   * @param exitListener Can be nul.\n+   * @param exitListener Can be null.\n    */\n   public void setExitListener(ProcessExitListener exitListener) {\n     this.exitListener = exitListener;\n   }\n \n   /**\n-   * @return The process that is currently executing or was the last one to be started using the run\n-   *     method.\n+   * The process that is currently executing or was the last one to be started using the run\n+   * method.\n    */\n   public Process getProcess() {\n     return this.process;\n   }\n \n   private void handleErrOut(final Process process) {\n-    if (stdErrLineListener != null) {\n-      final Scanner stdErr = new Scanner(process.getErrorStream());\n-      Thread stdErrThread = new Thread(\"standard-err\") {\n-        public void run() {\n-          while (stdErr.hasNextLine() && !Thread.interrupted()) {\n-            String line = stdErr.nextLine();\n-            stdErrLineListener.outputLine(line);\n-          }\n+    final Scanner stdErr = new Scanner(process.getErrorStream());\n+    Thread stdErrThread = new Thread(\"standard-err\") {\n+      public void run() {\n+        while (stdErr.hasNextLine() && !Thread.interrupted()) {\n+          String line = stdErr.nextLine();\n+          consumeLine(line, true);\n         }\n-      };\n-      stdErrThread.setDaemon(true);\n-      stdErrThread.start();\n-    }\n+      }\n+    };\n+    stdErrThread.setDaemon(true);\n+    stdErrThread.start();\n   }\n \n   private void handleStdOut(final Process process) {\n-    if (stdOutLineListener != null) {\n-      final Scanner stdOut = new Scanner(process.getInputStream());\n-      Thread stdOutThread = new Thread(\"standard-out\") {\n-        public void run() {\n-          while (stdOut.hasNextLine() && !Thread.interrupted()) {\n-            String line = stdOut.nextLine();\n-            stdOutLineListener.outputLine(line);\n-          }\n+    final Scanner stdOut = new Scanner(process.getInputStream());\n+    Thread stdOutThread = new Thread(\"standard-out\") {\n+      public void run() {\n+        while (stdOut.hasNextLine() && !Thread.interrupted()) {\n+          String line = stdOut.nextLine();\n+          consumeLine(line, false);\n         }\n-      };\n-      stdOutThread.setDaemon(true);\n-      stdOutThread.start();\n+      }\n+    };\n+    stdOutThread.setDaemon(true);\n+    stdOutThread.start();\n+  }\n+\n+  private void handleWaitSuccess() throws InterruptedException, ProcessRunnerException {\n+    try {\n+      if (async && waitSuccessMessage != null && waitSuccessTimeoutSeconds != 0) {\n+        log.info(\"Waiting \" + waitSuccessTimeoutSeconds\n+            + \" seconds for the operation to succeed...\");\n+        if (!waitSuccessLatch.await(waitSuccessTimeoutSeconds, TimeUnit.SECONDS)) {","path":"src/main/java/com/google/cloud/tools/app/impl/cloudsdk/internal/process/DefaultProcessRunner.java","position":162,"original_position":162,"commit_id":"7fc34bd1216bd0e7168e66960586d1a263536ad3","original_commit_id":"7fc34bd1216bd0e7168e66960586d1a263536ad3","user":{"login":"etanshaul","id":1735744,"avatar_url":"https://avatars.githubusercontent.com/u/1735744?v=3","gravatar_id":"","url":"https://api.github.com/users/etanshaul","html_url":"https://github.com/etanshaul","followers_url":"https://api.github.com/users/etanshaul/followers","following_url":"https://api.github.com/users/etanshaul/following{/other_user}","gists_url":"https://api.github.com/users/etanshaul/gists{/gist_id}","starred_url":"https://api.github.com/users/etanshaul/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/etanshaul/subscriptions","organizations_url":"https://api.github.com/users/etanshaul/orgs","repos_url":"https://api.github.com/users/etanshaul/repos","events_url":"https://api.github.com/users/etanshaul/events{/privacy}","received_events_url":"https://api.github.com/users/etanshaul/received_events","type":"User","site_admin":false},"body":"won't this cause synchronous runs to block?","created_at":"2016-05-13T15:08:17Z","updated_at":"2016-05-13T15:08:17Z","html_url":"https://github.com/GoogleCloudPlatform/app-tools-lib-for-java/pull/67#discussion_r63199235","pull_request_url":"https://api.github.com/repos/GoogleCloudPlatform/app-tools-lib-for-java/pulls/67","_links":{"self":{"href":"https://api.github.com/repos/GoogleCloudPlatform/app-tools-lib-for-java/pulls/comments/63199235"},"html":{"href":"https://github.com/GoogleCloudPlatform/app-tools-lib-for-java/pull/67#discussion_r63199235"},"pull_request":{"href":"https://api.github.com/repos/GoogleCloudPlatform/app-tools-lib-for-java/pulls/67"}}},"pull_request":{"url":"https://api.github.com/repos/GoogleCloudPlatform/app-tools-lib-for-java/pulls/67","id":69893072,"html_url":"https://github.com/GoogleCloudPlatform/app-tools-lib-for-java/pull/67","diff_url":"https://github.com/GoogleCloudPlatform/app-tools-lib-for-java/pull/67.diff","patch_url":"https://github.com/GoogleCloudPlatform/app-tools-lib-for-java/pull/67.patch","issue_url":"https://api.github.com/repos/GoogleCloudPlatform/app-tools-lib-for-java/issues/67","number":67,"state":"open","locked":false,"title":"Allow waiting for successful start of async commands","user":{"login":"meltsufin","id":17732492,"avatar_url":"https://avatars.githubusercontent.com/u/17732492?v=3","gravatar_id":"","url":"https://api.github.com/users/meltsufin","html_url":"https://github.com/meltsufin","followers_url":"https://api.github.com/users/meltsufin/followers","following_url":"https://api.github.com/users/meltsufin/following{/other_user}","gists_url":"https://api.github.com/users/meltsufin/gists{/gist_id}","starred_url":"https://api.github.com/users/meltsufin/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/meltsufin/subscriptions","organizations_url":"https://api.github.com/users/meltsufin/orgs","repos_url":"https://api.github.com/users/meltsufin/repos","events_url":"https://api.github.com/users/meltsufin/events{/privacy}","received_events_url":"https://api.github.com/users/meltsufin/received_events","type":"User","site_admin":false},"body":"This fixes #60 which is about detecting when Dev App Server has started.\r\nThis also adds a builder to the DefaultProcesRunner.\r\nAlso fixes #63 \r\n\r\nNotice that this adds a general mechanism for detecting when an asynchronously started operation has succeeded.\r\n\r\nThe clients are also no longer allowed to configure and provide the ProcessBuilder because if they set inheritIO to true, capturing output doesn't work. Instead, clients that need to consume the process output should use the ProcessOutputLineListener.\r\n\r\n@loosebazooka @etanshaul 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