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ASF GitHub Bot logged work on BEAM-4018: ---------------------------------------- Author: ASF GitHub Bot Created on: 23/Apr/18 23:25 Start Date: 23/Apr/18 23:25 Worklog Time Spent: 10m Work Description: jkff commented on a change in pull request #5175: [BEAM-4018] Add a ByteKeyRangeTracker based on RestrictionTracker for SDF URL: https://github.com/apache/beam/pull/5175#discussion_r183565569 ########## File path: sdks/java/core/src/main/java/org/apache/beam/sdk/transforms/splittabledofn/ByteKeyRangeTracker.java ########## @@ -0,0 +1,159 @@ +/* + * 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.beam.sdk.transforms.splittabledofn; + +import static com.google.common.base.Preconditions.checkArgument; +import static com.google.common.base.Preconditions.checkNotNull; +import static com.google.common.base.Preconditions.checkState; + +import com.google.common.annotations.VisibleForTesting; +import com.google.common.base.MoreObjects; +import java.util.Arrays; +import javax.annotation.Nullable; +import org.apache.beam.sdk.io.range.ByteKey; +import org.apache.beam.sdk.io.range.ByteKeyRange; +import org.apache.beam.sdk.transforms.DoFn; + +/** + * A {@link RestrictionTracker} for claiming {@link ByteKey}s in a {@link ByteKeyRange} in a + * monotonically increasing fashion. The range is a semi-open bounded interval [startKey, endKey) + * where the limits are both represented by ByteKey.EMPTY. + */ +public class ByteKeyRangeTracker extends RestrictionTracker<ByteKeyRange, ByteKey> { + private ByteKeyRange range; + @Nullable private ByteKey lastClaimedKey = null; + @Nullable private ByteKey lastAttemptedKey = null; + + private ByteKeyRangeTracker(ByteKeyRange range) { + this.range = checkNotNull(range); + } + + public static ByteKeyRangeTracker of(ByteKeyRange range) { + return new ByteKeyRangeTracker(ByteKeyRange.of(range.getStartKey(), range.getEndKey())); + } + + @Override + public synchronized ByteKeyRange currentRestriction() { + return range; + } + + @Override + public synchronized ByteKeyRange checkpoint() { + checkState(lastClaimedKey != null, "Can't checkpoint before any key was successfully claimed"); + ByteKeyRange res = ByteKeyRange.of(next(lastClaimedKey), range.getEndKey()); Review comment: Extract next(..) into a variable? ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org Issue Time Tracking ------------------- Worklog Id: (was: 94368) Time Spent: 6h 10m (was: 6h) > Add a ByteKeyRangeTracker based on RestrictionTracker for SDF > ------------------------------------------------------------- > > Key: BEAM-4018 > URL: https://issues.apache.org/jira/browse/BEAM-4018 > Project: Beam > Issue Type: New Feature > Components: sdk-java-core > Reporter: Ismaël Mejía > Assignee: Ismaël Mejía > Priority: Minor > Time Spent: 6h 10m > Remaining Estimate: 0h > > We can have a RestrictionTracker for ByteKey ranges as part of the core sdk > so it can be reused by future SDF based IOs like Bigtable, HBase among others. -- This message was sent by Atlassian JIRA (v7.6.3#76005)