/*
* 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.testutils;
import java.io.IOException;
import java.util.Random;
import org.apache.flink.core.memory.MemorySegment;
import org.apache.flink.runtime.io.network.Buffer;
import org.apache.flink.runtime.io.network.BufferRecycler;
import org.apache.flink.runtime.io.network.bufferprovider.BufferAvailabilityListener;
import org.apache.flink.runtime.io.network.bufferprovider.BufferProvider;
public class TestBufferProvider implements BufferProvider {
private final BufferRecycler recycler = new DiscardingRecycler();
private final Random rnd = new Random();
private final int sizeOfMemorySegments;
private final float probabilityForNoneAvailable;
public TestBufferProvider(int sizeOfMemorySegments) {
this(sizeOfMemorySegments, -1.0f);
}
public TestBufferProvider(int sizeOfMemorySegments, float probabilityForNoneAvailable) {
this.sizeOfMemorySegments = sizeOfMemorySegments;
this.probabilityForNoneAvailable = probabilityForNoneAvailable;
}
@Override
public Buffer requestBuffer(int sizeOfBuffer) throws IOException {
if (rnd.nextFloat() < this.probabilityForNoneAvailable) {
return null;
} else {
MemorySegment segment = new MemorySegment(new byte[this.sizeOfMemorySegments]);
return new Buffer(segment, sizeOfBuffer, this.recycler);
}
}
@Override
public Buffer requestBufferBlocking(int sizeOfBuffer) throws IOException, InterruptedException {
MemorySegment segment = new MemorySegment(new byte[this.sizeOfMemorySegments]);
return new Buffer(segment, sizeOfBuffer, this.recycler);
}
@Override
public int getBufferSize() {
return Integer.MAX_VALUE;
}
@Override
public void reportAsynchronousEvent() {
throw new UnsupportedOperationException();
}
@Override
public BufferAvailabilityRegistration registerBufferAvailabilityListener(BufferAvailabilityListener bufferAvailabilityListener) {
throw new UnsupportedOperationException();
}
}