com.amazonaws.services.kinesis.clientlibrary.lib.worker.PreparedCheckpointer Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of amazon-kinesis-client Show documentation

The Amazon Kinesis Client Library for Java enables Java developers to easily consume and process data from Amazon Kinesis.

There is a newer version: 1.15.2

Show newest version

/*
 * Copyright 2019 Amazon.com, Inc. or its affiliates.
 * 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 com.amazonaws.services.kinesis.clientlibrary.lib.worker;

import com.amazonaws.services.kinesis.clientlibrary.exceptions.InvalidStateException;
import com.amazonaws.services.kinesis.clientlibrary.exceptions.KinesisClientLibDependencyException;
import com.amazonaws.services.kinesis.clientlibrary.exceptions.ShutdownException;
import com.amazonaws.services.kinesis.clientlibrary.exceptions.ThrottlingException;
import com.amazonaws.services.kinesis.clientlibrary.interfaces.IPreparedCheckpointer;
import com.amazonaws.services.kinesis.clientlibrary.interfaces.IRecordProcessorCheckpointer;
import com.amazonaws.services.kinesis.clientlibrary.types.ExtendedSequenceNumber;

/**
 * Objects of this class are prepared to checkpoint at a specific sequence number. They use an
 * IRecordProcessorCheckpointer to do the actual checkpointing, so their checkpoint is subject to the same 'didn't go
 * backwards' validation as a normal checkpoint.
 */
public class PreparedCheckpointer implements IPreparedCheckpointer {

    private final ExtendedSequenceNumber pendingCheckpointSequenceNumber;
    private final IRecordProcessorCheckpointer checkpointer;

    /**
     * Constructor.
     *
     * @param pendingCheckpointSequenceNumber sequence number to checkpoint at
     * @param checkpointer checkpointer to use
     */
    public PreparedCheckpointer(ExtendedSequenceNumber pendingCheckpointSequenceNumber,
                                IRecordProcessorCheckpointer checkpointer) {
        this.pendingCheckpointSequenceNumber = pendingCheckpointSequenceNumber;
        this.checkpointer = checkpointer;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public ExtendedSequenceNumber getPendingCheckpoint() {
        return pendingCheckpointSequenceNumber;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void checkpoint()
            throws KinesisClientLibDependencyException, InvalidStateException, ThrottlingException, ShutdownException,
            IllegalArgumentException {
        checkpointer.checkpoint(pendingCheckpointSequenceNumber.getSequenceNumber(),
                pendingCheckpointSequenceNumber.getSubSequenceNumber());
    }
}