{"action":"created","comment":{"url":"https://api.github.com/repos/apache/incubator-beam/pulls/comments/56558454","id":56558454,"diff_hunk":"@@ -0,0 +1,147 @@\n+/*\n+ * Copyright (C) 2016 Google Inc.\n+ *\n+ * Licensed under the Apache License, Version 2.0 (the \"License\"); you may not\n+ * use this file except in compliance with the License. You may obtain a copy of\n+ * the License at\n+ *\n+ * http://www.apache.org/licenses/LICENSE-2.0\n+ *\n+ * Unless required by applicable law or agreed to in writing, software\n+ * distributed under the License is distributed on an \"AS IS\" BASIS, WITHOUT\n+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the\n+ * License for the specific language governing permissions and limitations under\n+ * the License.\n+ */\n+package com.google.cloud.dataflow.sdk.runners.inprocess;\n+\n+import com.google.common.base.MoreObjects;\n+\n+import java.util.Map;\n+import java.util.Queue;\n+import java.util.concurrent.ConcurrentLinkedQueue;\n+import java.util.concurrent.ExecutorService;\n+import java.util.concurrent.atomic.AtomicReference;\n+\n+/**\n+ * Static factory methods for constructing instances of {@link TransformExecutorService}.\n+ */\n+final class TransformExecutorServices {\n+  private TransformExecutorServices() {\n+    // Do not instantiate\n+  }\n+\n+  /**\n+   * Returns an EvaluationState that evaluates {@link TransformExecutor TransformExecutors} in\n+   * parallel.\n+   */\n+  public static TransformExecutorService parallel(\n+      ExecutorService executor, Map<TransformExecutor<?>, Boolean> scheduled) {\n+    return new ParallelEvaluationState(executor, scheduled);\n+  }\n+\n+  /**\n+   * Returns an EvaluationState that evaluates {@link TransformExecutor TransformExecutors} in\n+   * serial.\n+   */\n+  public static TransformExecutorService serial(\n+      ExecutorService executor, Map<TransformExecutor<?>, Boolean> scheduled) {\n+    return new SerialEvaluationState(executor, scheduled);\n+  }\n+\n+  /**\n+   * The evaluation of a step where the input is unkeyed. Unkeyed inputs can be evaluated in\n+   * parallel with an arbitrary amount of parallelism.\n+   */\n+  private static class ParallelEvaluationState implements TransformExecutorService {\n+    private final ExecutorService executor;\n+    private final Map<TransformExecutor<?>, Boolean> scheduled;\n+\n+    private ParallelEvaluationState(\n+        ExecutorService executor, Map<TransformExecutor<?>, Boolean> scheduled) {\n+      this.executor = executor;\n+      this.scheduled = scheduled;\n+    }\n+\n+    @Override\n+    public void schedule(TransformExecutor<?> work) {\n+      executor.submit(work);\n+      scheduled.put(work, true);\n+    }\n+\n+    @Override\n+    public void complete(TransformExecutor<?> completed) {\n+      scheduled.remove(completed);\n+    }\n+  }\n+\n+  /**\n+   * The evaluation of a (Step, Key) pair. (Step, Key) computations are processed serially;","path":"sdk/src/main/java/com/google/cloud/dataflow/sdk/runners/inprocess/TransformExecutorServices.java","position":null,"original_position":79,"commit_id":"f2aba379c872ee4860ea1bd2eb9aefde34f60795","original_commit_id":"bac398b5ac8c7c29a85f9bb56886e8e9429c213c","user":{"login":"tgroh","id":429866,"avatar_url":"https://avatars.githubusercontent.com/u/429866?v=3","gravatar_id":"","url":"https://api.github.com/users/tgroh","html_url":"https://github.com/tgroh","followers_url":"https://api.github.com/users/tgroh/followers","following_url":"https://api.github.com/users/tgroh/following{/other_user}","gists_url":"https://api.github.com/users/tgroh/gists{/gist_id}","starred_url":"https://api.github.com/users/tgroh/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/tgroh/subscriptions","organizations_url":"https://api.github.com/users/tgroh/orgs","repos_url":"https://api.github.com/users/tgroh/repos","events_url":"https://api.github.com/users/tgroh/events{/privacy}","received_events_url":"https://api.github.com/users/tgroh/received_events","type":"User","site_admin":false},"body":"Done.","created_at":"2016-03-17T18:51:33Z","updated_at":"2016-03-17T18:51:33Z","html_url":"https://github.com/apache/incubator-beam/pull/53#discussion_r56558454","pull_request_url":"https://api.github.com/repos/apache/incubator-beam/pulls/53","_links":{"self":{"href":"https://api.github.com/repos/apache/incubator-beam/pulls/comments/56558454"},"html":{"href":"https://github.com/apache/incubator-beam/pull/53#discussion_r56558454"},"pull_request":{"href":"https://api.github.com/repos/apache/incubator-beam/pulls/53"}}},"pull_request":{"url":"https://api.github.com/repos/apache/incubator-beam/pulls/53","id":62980185,"html_url":"https://github.com/apache/incubator-beam/pull/53","diff_url":"https://github.com/apache/incubator-beam/pull/53.diff","patch_url":"https://github.com/apache/incubator-beam/pull/53.patch","issue_url":"https://api.github.com/repos/apache/incubator-beam/issues/53","number":53,"state":"open","locked":false,"title":"[BEAM-22] Add ExecutorServiceParallelExecutor as an InProcessExecutor","user":{"login":"tgroh","id":429866,"avatar_url":"https://avatars.githubusercontent.com/u/429866?v=3","gravatar_id":"","url":"https://api.github.com/users/tgroh","html_url":"https://github.com/tgroh","followers_url":"https://api.github.com/users/tgroh/followers","following_url":"https://api.github.com/users/tgroh/following{/other_user}","gists_url":"https://api.github.com/users/tgroh/gists{/gist_id}","starred_url":"https://api.github.com/users/tgroh/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/tgroh/subscriptions","organizations_url":"https://api.github.com/users/tgroh/orgs","repos_url":"https://api.github.com/users/tgroh/repos","events_url":"https://api.github.com/users/tgroh/events{/privacy}","received_events_url":"https://api.github.com/users/tgroh/received_events","type":"User","site_admin":false},"body":"This is responsible for scheduling transform evaluations and\r\ncommunicating results back to the evaluation context. The executor\r\nhandle PTransforms that block arbitarily waiting for additional input.\r\n\r\n","created_at":"2016-03-15T21:30:48Z","updated_at":"2016-03-17T18:51:33Z","closed_at":null,"merged_at":null,"merge_commit_sha":"5478e21442ffaf835a50bdb58f99cc28a237cdbb","assignee":null,"milestone":null,"commits_url":"https://api.github.com/repos/apache/incubator-beam/pulls/53/commits","review_comments_url":"https://api.github.com/repos/apache/incubator-beam/pulls/53/comments","review_comment_url":"https://api.github.com/repos/apache/incubator-beam/pulls/comments{/number}","comments_url":"https://api.github.com/repos/apache/incubator-beam/issues/53/comments","statuses_url":"https://api.github.com/repos/apache/incubator-beam/statuses/f2aba379c872ee4860ea1bd2eb9aefde34f60795","head":{"label":"tgroh:ippr_executor","ref":"ippr_executor","sha":"f2aba379c872ee4860ea1bd2eb9aefde34f60795","user":{"login":"tgroh","id":429866,"avatar_url":"https://avatars.githubusercontent.com/u/429866?v=3","gravatar_id":"","url":"https://api.github.com/users/tgroh","html_url":"https://github.com/tgroh","followers_url":"https://api.github.com/users/tgroh/followers","following_url":"https://api.github.com/users/tgroh/following{/other_user}","gists_url":"https://api.github.com/users/tgroh/gists{/gist_id}","starred_url":"https://api.github.com/users/tgroh/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/tgroh/subscriptions","organizations_url":"https://api.github.com/users/tgroh/orgs","repos_url":"https://api.github.com/users/tgroh/repos","events_url":"https://api.github.com/users/tgroh/events{/privacy}","received_events_url":"https://api.github.com/users/tgroh/received_events","type":"User","site_admin":false},"repo":{"id":52644388,"name":"incubator-beam","full_name":"tgroh/incubator-beam","owner":{"login":"tgroh","id":429866,"avatar_url":"https://avatars.githubusercontent.com/u/429866?v=3","gravatar_id":"","url":"https://api.github.com/users/tgroh","html_url":"https://github.com/tgroh","followers_url":"https://api.github.com/users/tgroh/followers","following_url":"https://api.github.com/users/tgroh/following{/other_user}","gists_url":"https://api.github.com/users/tgroh/gists{/gist_id}","starred_url":"https://api.github.com/users/tgroh/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/tgroh/subscriptions","organizations_url":"https://api.github.com/users/tgroh/orgs","repos_url":"https://api.github.com/users/tgroh/repos","events_url":"https://api.github.com/users/tgroh/events{/privacy}","received_events_url":"https://api.github.com/users/tgroh/received_events","type":"User","site_admin":false},"private":false,"html_url":"https://github.com/tgroh/incubator-beam","description":"Mirror 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