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129
presto-hive/src/main/java/com/facebook/presto/hive/parquet/ParquetMetadataStats.java
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|---|---|---|
| @@ -0,0 +1,129 @@ | ||
| /* | ||
| * 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.facebook.presto.hive.parquet; | ||
|
|
||
| import com.fasterxml.jackson.databind.ObjectMapper; | ||
| import io.airlift.stats.DistributionStat; | ||
| import org.weakref.jmx.Managed; | ||
| import org.weakref.jmx.Nested; | ||
|
|
||
| import javax.inject.Inject; | ||
|
|
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| import java.util.HashMap; | ||
| import java.util.LinkedHashMap; | ||
| import java.util.Map; | ||
|
|
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| public class ParquetMetadataStats | ||
| { | ||
| private final DistributionStat metadataLength; | ||
| private final DistributionStat readSize; | ||
| private final Map<String, DistributionStat> dataReadSize; | ||
| private final Map<String, DistributionStat> dictionaryReadSize; | ||
| private final Map<String, DistributionStat> pageSize; | ||
|
|
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| private static ObjectMapper objectMapper = new ObjectMapper(); | ||
|
|
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| @Inject | ||
| public ParquetMetadataStats() | ||
| { | ||
| this.metadataLength = new DistributionStat(); | ||
| this.readSize = new DistributionStat(); | ||
| this.dataReadSize = new HashMap<>(); | ||
| this.dictionaryReadSize = new HashMap<>(); | ||
| this.pageSize = new HashMap<>(); | ||
| } | ||
|
|
||
| @Managed | ||
| @Nested | ||
| public DistributionStat getMetadataLength() | ||
| { | ||
| return metadataLength; | ||
| } | ||
|
|
||
| @Managed | ||
| @Nested | ||
| public DistributionStat getReadSize() | ||
| { | ||
| return readSize; | ||
| } | ||
|
|
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| @Managed | ||
| public String getDataReadSize() | ||
| { | ||
| return getSnapshot(dataReadSize); | ||
| } | ||
|
|
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| @Managed | ||
| public String getDictionaryReadSize() | ||
| { | ||
| return getSnapshot(dictionaryReadSize); | ||
| } | ||
|
|
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| @Managed | ||
| public String getPageSize() | ||
| { | ||
| return getSnapshot(pageSize); | ||
| } | ||
|
|
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| private static String getSnapshot(Map<String, DistributionStat> stats) | ||
| { | ||
| Map<String, DistributionStat.DistributionStatSnapshot> result = new LinkedHashMap<>(stats.size()); | ||
| for (Map.Entry<String, DistributionStat> entry : stats.entrySet()) { | ||
| result.put(entry.getKey(), entry.getValue().snapshot()); | ||
| } | ||
| return toJson(result); | ||
| } | ||
|
|
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| private static String toJson(Map<String, DistributionStat.DistributionStatSnapshot> snapshot) | ||
| { | ||
| try { | ||
| return objectMapper.writeValueAsString(snapshot); | ||
| } | ||
| catch (Exception ignore) { | ||
| return snapshot.toString(); | ||
| } | ||
| } | ||
|
|
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| public void addDataReadSize(String name, long size) | ||
| { | ||
| synchronized (this) { | ||
| addSize(dataReadSize, name, size); | ||
| readSize.add(size); | ||
| } | ||
| } | ||
|
|
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| public void addDictionaryReadSize(String name, long size) | ||
| { | ||
| synchronized (this) { | ||
| addSize(dictionaryReadSize, name, size); | ||
| readSize.add(size); | ||
| } | ||
| } | ||
|
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| public void addPageSize(String name, long size) | ||
| { | ||
| synchronized (this) { | ||
| addSize(pageSize, name, size); | ||
| } | ||
| } | ||
|
|
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| private static void addSize(Map<String, DistributionStat> stats, String name, long size) | ||
| { | ||
| if (!stats.containsKey(name)) { | ||
| stats.put(name, new DistributionStat()); | ||
| } | ||
|
|
||
| stats.get(name).add(size); | ||
| } | ||
| } |
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