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https://issues.apache.org/jira/browse/FLINK-8178?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16287911#comment-16287911
]
ASF GitHub Bot commented on FLINK-8178:
---------------------------------------
Github user NicoK commented on a diff in the pull request:
https://github.com/apache/flink/pull/5105#discussion_r156403311
--- Diff:
flink-runtime/src/test/java/org/apache/flink/runtime/io/network/api/writer/RecordOrEventCollectingResultPartitionWriter.java
---
@@ -0,0 +1,104 @@
+/*
+ * 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 org.apache.flink.runtime.io.network.api.writer;
+
+import org.apache.flink.api.common.typeutils.TypeSerializer;
+import org.apache.flink.runtime.event.AbstractEvent;
+import
org.apache.flink.runtime.io.network.api.serialization.AdaptiveSpanningRecordDeserializer;
+import
org.apache.flink.runtime.io.network.api.serialization.EventSerializer;
+import
org.apache.flink.runtime.io.network.api.serialization.RecordDeserializer;
+import org.apache.flink.runtime.io.network.buffer.Buffer;
+import org.apache.flink.runtime.io.network.buffer.BufferProvider;
+import org.apache.flink.runtime.io.network.partition.ResultPartitionID;
+import org.apache.flink.runtime.plugable.DeserializationDelegate;
+import org.apache.flink.runtime.plugable.NonReusingDeserializationDelegate;
+
+import java.io.IOException;
+import java.util.Collection;
+
+import static org.apache.flink.util.Preconditions.checkNotNull;
+import static org.apache.flink.util.Preconditions.checkState;
+
+/**
+ * {@link ResultPartitionWriter} that collects records or events on the
List.
+ */
+public class RecordOrEventCollectingResultPartitionWriter<T> implements
ResultPartitionWriter {
+ private final Collection<Object> output;
+ private final BufferProvider bufferProvider;
+ private final NonReusingDeserializationDelegate<T> delegate;
+
+ final RecordDeserializer<DeserializationDelegate<T>> deserializer = new
AdaptiveSpanningRecordDeserializer<>();
--- End diff --
make `private`
> Introduce not threadsafe write only BufferBuilder
> -------------------------------------------------
>
> Key: FLINK-8178
> URL: https://issues.apache.org/jira/browse/FLINK-8178
> Project: Flink
> Issue Type: Improvement
> Components: Network
> Reporter: Piotr Nowojski
> Assignee: Piotr Nowojski
> Fix For: 1.5.0
>
>
> While Buffer class is used in multithreaded context it requires
> synchronisation. Now it is miss-leading/unclear and suggesting that
> RecordSerializer should take into account synchronisation of the Buffer
> that's holding. With NotThreadSafe BufferBuilder there would be clear
> separation between single-threaded writing/creating a BufferBuilder and
> multithreaded Buffer handling/retaining/recycling.
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