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Posted to dev@apex.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2016/03/18 21:39:33 UTC
[jira] [Commented] (APEXMALHAR-1897) Create ManagedState
[ https://issues.apache.org/jira/browse/APEXMALHAR-1897?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15202110#comment-15202110 ]
ASF GitHub Bot commented on APEXMALHAR-1897:
--------------------------------------------
Github user amberarrow commented on a diff in the pull request:
https://github.com/apache/incubator-apex-malhar/pull/145#discussion_r56718885
--- Diff: library/src/main/java/com/datatorrent/lib/state/BucketedState.java ---
@@ -0,0 +1,60 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package com.datatorrent.lib.state;
+
+import java.util.concurrent.Future;
+
+import com.datatorrent.netlet.util.Slice;
+
+/**
+ * A state where keys are grouped in buckets.
+ */
+public interface BucketedState
+{
+ /**
+ * Sets the value of the key in bucket identified by bucketId.
+ *
+ * @param bucketId identifier of the bucket.
+ * @param key key
+ * @param value value
+ */
+ void put(long bucketId, Slice key, Slice value);
+
+ /**
+ * Returns the value of the key in a bucket identified by bucketId. Fetching a key can be expensive if the key
+ * is not in memory and is present on disk. This fetches the key synchronously. <br/>
+ * {@link #getAsync(long, Slice)} is recommended for efficiently reading the value of a key.
+ *
+ * @param bucketId identifier of the bucket.
+ * @param key key
+ * @return value
+ */
+ Slice getSync(long bucketId, Slice key);
+
+ /**
+ * Returns the future using which the value is obtained.<br/>
+ * If the key is present in memory, then the future has its value set when constructed.
--- End diff --
Suggest omitting "in memory" or replacing with "in the bucket" (multiple places)
> Create ManagedState
> -------------------
>
> Key: APEXMALHAR-1897
> URL: https://issues.apache.org/jira/browse/APEXMALHAR-1897
> Project: Apache Apex Malhar
> Issue Type: Sub-task
> Reporter: Chandni Singh
> Assignee: Chandni Singh
> Fix For: 3.4.0
>
>
> ManagedState is described in the document below:
> https://docs.google.com/document/d/1gRWN9ufKSZSZD0N-pthlhpC9TZ8KwJ6hJlAX6nxl5f8/edit#heading=h.z87ti1fwyt0t
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