Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Browse files
Browse the repository at this point in the history
- Loading branch information
1 parent
d123d42
commit 51dc912
Showing
3 changed files
with
193 additions
and
29 deletions.
There are no files selected for viewing
138 changes: 138 additions & 0 deletions
138
modules/accumulo/src/main/java/org/apache/fluo/accumulo/iterators/ColumnBuffer.java
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,138 @@ | ||
| /* | ||
| * 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.fluo.accumulo.iterators; | ||
|
|
||
| import java.lang.IllegalArgumentException; | ||
| import java.util.ArrayList; | ||
| import java.util.Arrays; | ||
| import java.util.function.LongPredicate; | ||
|
|
||
| import org.apache.accumulo.core.data.Key; | ||
| import org.apache.accumulo.core.data.PartialKey; | ||
| import org.apache.accumulo.core.data.Value; | ||
|
|
||
| /** | ||
| * This class buffers Keys that all have the same row+column. Internally | ||
| * it only stores one Key, a list of timestamps and a list of values. At iteration | ||
| * time it materializes each Key+Value. | ||
| */ | ||
| class ColumnBuffer { | ||
|
|
||
| private Key key; | ||
| private ArrayList<Long> timeStamps; | ||
| private ArrayList<byte[]> values; | ||
|
|
||
| public ColumnBuffer() { | ||
|
|
||
| this.key = null; | ||
| this.timeStamps = new ArrayList<>(); | ||
| this.values = new ArrayList<>(); | ||
| } | ||
|
|
||
| /** | ||
| * @param timestamp Timestamp to be added to buffer | ||
| * @param v Value to be added to buffer | ||
| */ | ||
| private void add(long timestamp, byte[] v) { | ||
|
|
||
| timeStamps.add(timestamp); | ||
| values.add(v); | ||
| } | ||
|
|
||
| /** | ||
| * When empty, the first key added sets the row+column. After this all keys | ||
| * added must have the same row+column. | ||
| * | ||
| * @param k Key to be added to buffer | ||
| * @param v Value to be added to buffer | ||
| */ | ||
| public void add(Key k, byte[] vByte) throws IllegalArgumentException { | ||
| vByte = Arrays.copyOf(vByte, vByte.length); | ||
|
|
||
| if (key == null) { | ||
| key = new Key(k); | ||
| add(k.getTimestamp(), vByte); | ||
| } else if (key.equals(k, PartialKey.ROW_COLFAM_COLQUAL_COLVIS)) { | ||
| add(k.getTimestamp(), vByte); | ||
| } else { | ||
| throw new IllegalArgumentException(); | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * When empty, the first key added sets the row+column. After this all keys | ||
| * added must have the same row+column. | ||
| * | ||
| * @param k Key to be added to buffer | ||
| * @param v Value to be added to buffer | ||
| */ | ||
| public void add(Key k, Value v) throws IllegalArgumentException { | ||
| add(k, v.get()); | ||
| } | ||
|
|
||
| /** | ||
| * Clears the dest ColumnBuffer and inserts all entries in dest where the timestamp passes | ||
| * the timestampTest. | ||
| * | ||
| * @param dest Destination ColumnBuffer | ||
| * @param timestampTest Test to determine which timestamps get added to dest | ||
| */ | ||
| public void copyTo(ColumnBuffer dest, LongPredicate timestampTest) { | ||
| dest.clear(); | ||
|
|
||
| if (key != null) { | ||
| dest.key = new Key(key); | ||
| } | ||
|
|
||
| for (int i = 0; i < timeStamps.size(); i++) { | ||
| long time = timeStamps.get(i); | ||
| if (timestampTest.test(time)) { | ||
| dest.add(time, values.get(i)); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| public void clear() { | ||
| timeStamps.clear(); | ||
| values.clear(); | ||
| key = null; | ||
| } | ||
|
|
||
| /** | ||
| * @return the size of the current buffer | ||
| */ | ||
| public int size() { | ||
| return timeStamps.size(); | ||
| } | ||
|
|
||
| /** | ||
| * @param pos Position of the Key that will be retrieved | ||
| * @return The key at a given position | ||
| */ | ||
| public Key getKey(int pos) { | ||
| Key tmpKey = new Key(key); | ||
| tmpKey.setTimestamp(timeStamps.get(pos)); | ||
| return tmpKey; | ||
| } | ||
|
|
||
| /** | ||
| * @param pos Position of the Value that will be retrieved | ||
| * @return The value at a given position | ||
| */ | ||
| public Value getValue(int pos) { | ||
| return new Value(values.get(pos)); | ||
| } | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
38 changes: 38 additions & 0 deletions
38
modules/accumulo/src/test/java/org/apache/fluo/accumulo/iterators/ColumnBufferTest.java
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,38 @@ | ||
| /* | ||
| * 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.fluo.accumulo.iterators; | ||
|
|
||
| import java.lang.IllegalArgumentException; | ||
|
|
||
| import org.apache.accumulo.core.data.Key; | ||
| import org.apache.accumulo.core.data.Value; | ||
| import org.junit.Assert; | ||
| import org.junit.Test; | ||
|
|
||
| public class ColumnBufferTest { | ||
|
|
||
| @Test | ||
| public void testDifferentKeys() { | ||
| ColumnBuffer columnBuffer = new ColumnBuffer(); | ||
| columnBuffer.add(new Key("row1"), new Value()); | ||
| try { | ||
| columnBuffer.add(new Key("row2"), new Value()); | ||
| Assert.fail(); | ||
| } catch (IllegalArgumentException e) { | ||
|
|
||
| } | ||
| } | ||
| } |