| /* |
| * 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.streaming.tests.artificialstate; |
| |
| import org.apache.flink.api.common.typeutils.SimpleTypeSerializerSnapshot; |
| import org.apache.flink.api.common.typeutils.TypeSerializer; |
| import org.apache.flink.api.java.typeutils.runtime.DataInputViewStream; |
| import org.apache.flink.core.memory.DataInputView; |
| import org.apache.flink.core.memory.DataOutputView; |
| import org.apache.flink.util.InstantiationUtil; |
| |
| import java.io.IOException; |
| import java.util.concurrent.atomic.AtomicReference; |
| |
| /** |
| * A custom stateful serializer to test that serializers are not used concurrently. |
| */ |
| public class StatefulComplexPayloadSerializer extends TypeSerializer<ComplexPayload> { |
| |
| private static final long serialVersionUID = 8766687317209282373L; |
| |
| /** This holds the thread that currently has exclusive ownership over the serializer. */ |
| private final AtomicReference<Thread> currentOwnerThread; |
| |
| public StatefulComplexPayloadSerializer() { |
| this.currentOwnerThread = new AtomicReference<>(null); |
| } |
| |
| @Override |
| public boolean isImmutableType() { |
| return false; |
| } |
| |
| @Override |
| public TypeSerializer<ComplexPayload> duplicate() { |
| return new StatefulComplexPayloadSerializer(); |
| } |
| |
| @Override |
| public ComplexPayload createInstance() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public ComplexPayload copy(ComplexPayload from) { |
| try { |
| Thread currentThread = Thread.currentThread(); |
| if (currentOwnerThread.compareAndSet(null, currentThread)) { |
| return InstantiationUtil.deserializeObject( |
| InstantiationUtil.serializeObject(from), currentThread.getContextClassLoader()); |
| } else { |
| throw new IllegalStateException("Concurrent access to type serializer detected!"); |
| } |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } finally { |
| currentOwnerThread.set(null); |
| } |
| } |
| |
| @Override |
| public ComplexPayload copy(ComplexPayload from, ComplexPayload reuse) { |
| return copy(from); |
| } |
| |
| @Override |
| public int getLength() { |
| return -1; |
| } |
| |
| @Override |
| public void serialize(ComplexPayload record, DataOutputView target) throws IOException { |
| try { |
| if (currentOwnerThread.compareAndSet(null, Thread.currentThread())) { |
| target.write(InstantiationUtil.serializeObject(record)); |
| } else { |
| throw new IllegalStateException("Concurrent access to type serializer detected!"); |
| } |
| } finally { |
| currentOwnerThread.set(null); |
| } |
| } |
| |
| @Override |
| public ComplexPayload deserialize(DataInputView source) throws IOException { |
| try (final DataInputViewStream inViewWrapper = new DataInputViewStream(source)) { |
| Thread currentThread = Thread.currentThread(); |
| if (currentOwnerThread.compareAndSet(null, currentThread)) { |
| return InstantiationUtil.deserializeObject( |
| inViewWrapper, |
| currentThread.getContextClassLoader()); |
| } else { |
| throw new IllegalStateException("Concurrent access to type serializer detected!"); |
| } |
| } catch (ClassNotFoundException e) { |
| throw new IOException("Could not deserialize object.", e); |
| } finally { |
| currentOwnerThread.set(null); |
| } |
| } |
| |
| @Override |
| public ComplexPayload deserialize(ComplexPayload reuse, DataInputView source) throws IOException { |
| return deserialize(source); |
| } |
| |
| @Override |
| public void copy(DataInputView source, DataOutputView target) throws IOException { |
| serialize(deserialize(source), target); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| return obj == this; |
| } |
| |
| @Override |
| public boolean canEqual(Object obj) { |
| return getClass().equals(obj.getClass()); |
| } |
| |
| @Override |
| public int hashCode() { |
| return 42; |
| } |
| |
| @Override |
| public Snapshot snapshotConfiguration() { |
| return new Snapshot(); |
| } |
| |
| private boolean isCompatibleSerializationFormatIdentifier(String identifier) { |
| return identifier.equals(getSerializationFormatIdentifier()); |
| } |
| |
| private String getSerializationFormatIdentifier() { |
| return getClass().getCanonicalName(); |
| } |
| |
| // ---------------------------------------------------------------------------------------- |
| |
| /** |
| * Snapshot for the {@link StatefulComplexPayloadSerializer}. |
| */ |
| public static class Snapshot extends SimpleTypeSerializerSnapshot<ComplexPayload> { |
| public Snapshot() { |
| super(StatefulComplexPayloadSerializer::new); |
| } |
| } |
| } |