{"action":"created","comment":{"url":"https://api.github.com/repos/apache/incubator-beam/pulls/comments/59808176","id":59808176,"diff_hunk":"@@ -0,0 +1,90 @@\n+/*\n+ * Licensed to the Apache Software Foundation (ASF) under one\n+ * or more contributor license agreements.  See the NOTICE file\n+ * distributed with this work for additional information\n+ * regarding copyright ownership.  The ASF licenses this file\n+ * to you under the Apache License, Version 2.0 (the\n+ * \"License\"); you may not use this file except in compliance\n+ * with the License.  You may obtain a copy of 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,\n+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n+ * See the License for the specific language governing permissions and\n+ * limitations under the License.\n+ */\n+package org.apache.beam.sdk.util;\n+\n+import org.apache.beam.sdk.coders.Coder;\n+import org.apache.beam.sdk.transforms.DoFn;\n+import org.apache.beam.sdk.transforms.DoFn.RequiresWindowAccess;\n+import org.apache.beam.sdk.transforms.GroupByKey;\n+import org.apache.beam.sdk.transforms.PTransform;\n+import org.apache.beam.sdk.transforms.ParDo;\n+import org.apache.beam.sdk.transforms.Values;\n+import org.apache.beam.sdk.transforms.WithKeys;\n+import org.apache.beam.sdk.transforms.windowing.Never;\n+import org.apache.beam.sdk.transforms.windowing.Window;\n+import org.apache.beam.sdk.transforms.windowing.WindowFn;\n+import org.apache.beam.sdk.util.WindowedValue.FullWindowedValueCoder;\n+import org.apache.beam.sdk.values.KV;\n+import org.apache.beam.sdk.values.PCollection;\n+import org.apache.beam.sdk.values.TypeDescriptor;\n+\n+/**\n+ * Accumulates all panes that are output to the input {@link PCollection}, reifying the contents of\n+ * those panes and emitting exactly one output pane.\n+ */\n+public class GatherAllPanes<T>\n+    extends PTransform<PCollection<T>, PCollection<Iterable<WindowedValue<T>>>> {\n+  public static <T> GatherAllPanes<T> create() {\n+    return new GatherAllPanes<>();\n+  }\n+\n+  private GatherAllPanes() {}\n+\n+  private static class ReifiyWindowAndPaneDoFn<ElemT> extends DoFn<ElemT, WindowedValue<ElemT>>\n+      implements RequiresWindowAccess {\n+    @Override\n+    public void processElement(DoFn<ElemT, WindowedValue<ElemT>>.ProcessContext c)\n+        throws Exception {\n+      c.output(WindowedValue.of(c.element(), c.timestamp(), c.window(), c.pane()));\n+    }\n+  }\n+\n+  @Override\n+  public PCollection<Iterable<WindowedValue<T>>> apply(PCollection<T> input) {\n+    WindowFn<?, ?> originalWindowFn = input.getWindowingStrategy().getWindowFn();\n+\n+    PCollection<WindowedValue<T>> reifiedWindows = input.apply(new ReifiyWindowedValue<T>());\n+    return reifiedWindows\n+        .apply(\n+            WithKeys.<Void, WindowedValue<T>>of((Void) null)\n+                .withKeyType(new TypeDescriptor<Void>() {}))\n+        .apply(\n+            Window.into(\n+                    new IdentityWindowFn<KV<Void, WindowedValue<T>>>(\n+                        originalWindowFn.windowCoder(),\n+                        input.getWindowingStrategy().getWindowFn().assignsToSingleWindow()))\n+                .triggering(Never.ever()))\n+        .apply(GroupByKey.<Void, WindowedValue<T>>create())\n+        .apply(Values.<Iterable<WindowedValue<T>>>create())\n+        .setWindowingStrategyInternal(input.getWindowingStrategy());\n+  }\n+\n+  private static class ReifiyWindowedValue<ElemT>","path":"sdks/java/core/src/main/java/org/apache/beam/sdk/util/GatherAllPanes.java","position":77,"original_position":77,"commit_id":"3cda11a26d0d568696866991e8245d587b21a149","original_commit_id":"3cda11a26d0d568696866991e8245d587b21a149","user":{"login":"bjchambers","id":35960,"avatar_url":"https://avatars.githubusercontent.com/u/35960?v=3","gravatar_id":"","url":"https://api.github.com/users/bjchambers","html_url":"https://github.com/bjchambers","followers_url":"https://api.github.com/users/bjchambers/followers","following_url":"https://api.github.com/users/bjchambers/following{/other_user}","gists_url":"https://api.github.com/users/bjchambers/gists{/gist_id}","starred_url":"https://api.github.com/users/bjchambers/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/bjchambers/subscriptions","organizations_url":"https://api.github.com/users/bjchambers/orgs","repos_url":"https://api.github.com/users/bjchambers/repos","events_url":"https://api.github.com/users/bjchambers/events{/privacy}","received_events_url":"https://api.github.com/users/bjchambers/received_events","type":"User","site_admin":false},"body":"`Reifiy` -> `Reify`.","created_at":"2016-04-14T23:24:23Z","updated_at":"2016-04-14T23:24:23Z","html_url":"https://github.com/apache/incubator-beam/pull/180#discussion_r59808176","pull_request_url":"https://api.github.com/repos/apache/incubator-beam/pulls/180","_links":{"self":{"href":"https://api.github.com/repos/apache/incubator-beam/pulls/comments/59808176"},"html":{"href":"https://github.com/apache/incubator-beam/pull/180#discussion_r59808176"},"pull_request":{"href":"https://api.github.com/repos/apache/incubator-beam/pulls/180"}}},"pull_request":{"url":"https://api.github.com/repos/apache/incubator-beam/pulls/180","id":66566375,"html_url":"https://github.com/apache/incubator-beam/pull/180","diff_url":"https://github.com/apache/incubator-beam/pull/180.diff","patch_url":"https://github.com/apache/incubator-beam/pull/180.patch","issue_url":"https://api.github.com/repos/apache/incubator-beam/issues/180","number":180,"state":"open","locked":false,"title":"[BEAM-155] Add GatherAllPanes PTransform","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":"Be sure to do all of the following to help us incorporate your contribution\r\nquickly and easily:\r\n\r\n - [x] Make sure the PR title is formatted like:\r\n   `[BEAM-<Jira issue #>] Description of pull request`\r\n - [x] Make sure tests pass via `mvn clean verify`. (Even better, enable\r\n       Travis-CI on your fork and ensure the whole test matrix passes).\r\n - [x] Replace `<Jira issue #>` in the title with the actual Jira issue\r\n       number, if there is one.\r\n - [x] If this contribution is large, please file an Apache\r\n       [Individual Contributor License Agreement](https://www.apache.org/licenses/icla.txt).\r\n\r\n---\r\n\r\nThis PTransform Reifies and gathers all panes produced for each\r\nwindow, outputting a single pane per window at the time the window is\r\nGarbage Collected.\r\n\r\nFor use in PAssert, to match over the final contents of each window.","created_at":"2016-04-14T22:48:08Z","updated_at":"2016-04-14T23:24:24Z","closed_at":null,"merged_at":null,"merge_commit_sha":"1b414f93eb188aa12e8d78f525c31e4b8377641e","assignee":null,"milestone":null,"commits_url":"https://api.github.com/repos/apache/incubator-beam/pulls/180/commits","review_comments_url":"https://api.github.com/repos/apache/incubator-beam/pulls/180/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/180/comments","statuses_url":"https://api.github.com/repos/apache/incubator-beam/statuses/3cda11a26d0d568696866991e8245d587b21a149","head":{"label":"tgroh:accumulate_all_panes","ref":"accumulate_all_panes","sha":"3cda11a26d0d568696866991e8245d587b21a149","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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