{"action":"created","comment":{"url":"https://api.github.com/repos/caskdata/cdap/pulls/comments/33811856","id":33811856,"diff_hunk":"@@ -0,0 +1,55 @@\n+/*\n+ * Copyright © 2015 Cask Data, 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+\n+package co.cask.cdap.api.dataset.lib;\n+\n+import java.util.Collections;\n+import java.util.Set;\n+import javax.annotation.Nullable;\n+\n+/**\n+ * Contains the state necessary to keep track of which partitions are processed and which partitions would need to be\n+ * processed as they are created.\n+ */\n+public class PartitionConsumerState {\n+  // useful on initial query of partitions\n+  public static final PartitionConsumerState FROM_BEGINNING =","path":"cdap-api/src/main/java/co/cask/cdap/api/dataset/lib/PartitionConsumerState.java","position":29,"original_position":29,"commit_id":"c09451b22ecc2481ae44d3536181b57cb6ae1ea3","original_commit_id":"c09451b22ecc2481ae44d3536181b57cb6ae1ea3","user":{"login":"anwar6953","id":2440977,"avatar_url":"https://avatars.githubusercontent.com/u/2440977?v=3","gravatar_id":"","url":"https://api.github.com/users/anwar6953","html_url":"https://github.com/anwar6953","followers_url":"https://api.github.com/users/anwar6953/followers","following_url":"https://api.github.com/users/anwar6953/following{/other_user}","gists_url":"https://api.github.com/users/anwar6953/gists{/gist_id}","starred_url":"https://api.github.com/users/anwar6953/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/anwar6953/subscriptions","organizations_url":"https://api.github.com/users/anwar6953/orgs","repos_url":"https://api.github.com/users/anwar6953/repos","events_url":"https://api.github.com/users/anwar6953/events{/privacy}","received_events_url":"https://api.github.com/users/anwar6953/received_events","type":"User","site_admin":false},"body":"https://github.com/caskdata/cdap/pull/3075#discussion_r33746967","created_at":"2015-07-02T19:07:22Z","updated_at":"2015-07-02T19:07:22Z","html_url":"https://github.com/caskdata/cdap/pull/3075#discussion_r33811856","pull_request_url":"https://api.github.com/repos/caskdata/cdap/pulls/3075","_links":{"self":{"href":"https://api.github.com/repos/caskdata/cdap/pulls/comments/33811856"},"html":{"href":"https://github.com/caskdata/cdap/pull/3075#discussion_r33811856"},"pull_request":{"href":"https://api.github.com/repos/caskdata/cdap/pulls/3075"}}},"pull_request":{"url":"https://api.github.com/repos/caskdata/cdap/pulls/3075","id":39011934,"html_url":"https://github.com/caskdata/cdap/pull/3075","diff_url":"https://github.com/caskdata/cdap/pull/3075.diff","patch_url":"https://github.com/caskdata/cdap/pull/3075.patch","issue_url":"https://api.github.com/repos/caskdata/cdap/issues/3075","number":3075,"state":"open","locked":false,"title":"CDAP-2747 - Use IndexedTable for PartitionedFileSet.","user":{"login":"anwar6953","id":2440977,"avatar_url":"https://avatars.githubusercontent.com/u/2440977?v=3","gravatar_id":"","url":"https://api.github.com/users/anwar6953","html_url":"https://github.com/anwar6953","followers_url":"https://api.github.com/users/anwar6953/followers","following_url":"https://api.github.com/users/anwar6953/following{/other_user}","gists_url":"https://api.github.com/users/anwar6953/gists{/gist_id}","starred_url":"https://api.github.com/users/anwar6953/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/anwar6953/subscriptions","organizations_url":"https://api.github.com/users/anwar6953/orgs","repos_url":"https://api.github.com/users/anwar6953/repos","events_url":"https://api.github.com/users/anwar6953/events{/privacy}","received_events_url":"https://api.github.com/users/anwar6953/received_events","type":"User","site_admin":false},"body":"Index partitions on transaction id, to allow consumption of partitions as they are created/committed, along with a simple consumer which holds its state in memory.\r\n\r\nhttps://issues.cask.co/browse/CDAP-2747\r\n\r\nThis is based off the design here:\r\nhttps://wiki.cask.co/display/CE/Periodically+consuming+partitions+of+a+PartitionedFileSetDataset\r\n\r\nThe design (API and implementation) for the client side to this functionality (likely a periodically-running workflow) has yet to be finalized.\r\n\r\nThe plan is to not merge this (but at least go through initial code review) until the design for the client side has been finalized (planned by tomorrow, 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