io.zeebe.test.util.io.RepeatedlyFailingOutputStream Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of zb-test-util Show documentation

There is a newer version: 0.16.4

/*
 * Copyright © 2017 camunda services GmbH ([email protected])
 *
 * Licensed 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 io.zeebe.test.util.io;

import java.io.IOException;
import java.io.OutputStream;

/**
 *
 */
public class RepeatedlyFailingOutputStream extends OutputStream
{
    public static final long DEFAULT_FAILURE_FREQUENCY = 8;

    private final OutputStream underlyingOutputStream;
    private final long failureFrequency;

    private long writeCount;

    public RepeatedlyFailingOutputStream(final OutputStream underlyingOutputStream)
    {
        this(underlyingOutputStream, DEFAULT_FAILURE_FREQUENCY);
    }

    public RepeatedlyFailingOutputStream(final OutputStream underlyingOutputStream, final long failureFrequency)
    {
        this.underlyingOutputStream = underlyingOutputStream;
        this.failureFrequency = failureFrequency;

        writeCount = 0;
    }

    public OutputStream getUnderlyingOutputStream()
    {
        return underlyingOutputStream;
    }

    @Override
    public void write(int b) throws IOException
    {
        writeCount++;

        if (writeCount % failureFrequency == 0)
        {
            throw new IOException("Write failure");
        }
        else
        {
            underlyingOutputStream.write(b);
        }
    }
}