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AMBARI-22365. Add storage support for storing metric definitions usin…
…g LevelDB. (swagle)
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| /** | ||
| * 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. | ||
| */ | ||
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| package org.apache.ambari.metrics.adservice.configuration | ||
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| import javax.validation.constraints.NotNull | ||
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| import com.fasterxml.jackson.annotation.JsonProperty | ||
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| class MetricDefinitionDBConfiguration { | ||
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| @NotNull | ||
| private var dbDirPath: String = _ | ||
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| @JsonProperty("verifyChecksums") | ||
| def verifyChecksums: Boolean = true | ||
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| @JsonProperty("performParanoidChecks") | ||
| def performParanoidChecks: Boolean = false | ||
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| @JsonProperty("dbDirPath") | ||
| def getDbDirPath: String = dbDirPath | ||
| } |
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| @@ -0,0 +1,73 @@ | ||
| /** | ||
| * 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. | ||
| */ | ||
|
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| package org.apache.ambari.metrics.adservice.db | ||
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| trait MetadataDatasource { | ||
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| type Key = Array[Byte] | ||
| type Value = Array[Byte] | ||
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| /** | ||
| * Idempotent call at the start of the application to initialize db | ||
| */ | ||
| def initialize(): Unit | ||
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| /** | ||
| * This function obtains the associated value to a key. It requires the (key-value) pair to be in the DataSource | ||
| * | ||
| * @param key | ||
| * @return the value associated with the passed key. | ||
| */ | ||
| def apply(key: Key): Value = get(key).get | ||
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| /** | ||
| * This function obtains the associated value to a key, if there exists one. | ||
| * | ||
| * @param key | ||
| * @return the value associated with the passed key. | ||
| */ | ||
| def get(key: Key): Option[Value] | ||
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| /** | ||
| * This function associates a key to a value, overwriting if necessary | ||
| */ | ||
| def put(key: Key, value: Value): Unit | ||
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| /** | ||
| * Delete key from the db | ||
| */ | ||
| def delete(key: Key): Unit | ||
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| /** | ||
| * This function updates the DataSource by deleting, updating and inserting new (key-value) pairs. | ||
| * | ||
| * @param toRemove which includes all the keys to be removed from the DataSource. | ||
| * @param toUpsert which includes all the (key-value) pairs to be inserted into the DataSource. | ||
| * If a key is already in the DataSource its value will be updated. | ||
| * @return the new DataSource after the removals and insertions were done. | ||
| */ | ||
| def update(toRemove: Seq[Key], toUpsert: Seq[(Key, Value)]): Unit | ||
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| /** | ||
| * This function closes the DataSource, without deleting the files used by it. | ||
| */ | ||
| def close(): Unit | ||
|
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| } |
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| @@ -0,0 +1,102 @@ | ||
| /** | ||
| * 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. | ||
| */ | ||
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| package org.apache.ambari.metrics.adservice.leveldb | ||
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| import java.io.File | ||
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| import org.apache.ambari.metrics.adservice.app.AnomalyDetectionAppConfig | ||
| import org.apache.ambari.metrics.adservice.configuration.MetricDefinitionDBConfiguration | ||
| import org.apache.ambari.metrics.adservice.db.MetadataDatasource | ||
| import org.iq80.leveldb.{DB, Options, WriteOptions} | ||
| import org.iq80.leveldb.impl.Iq80DBFactory | ||
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| import com.google.inject.Singleton | ||
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| @Singleton | ||
| class LevelDBDataSource(appConfig: AnomalyDetectionAppConfig) extends MetadataDatasource { | ||
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| private var db: DB = _ | ||
| @volatile var isInitialized: Boolean = false | ||
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| override def initialize(): Unit = { | ||
| if (isInitialized) return | ||
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| val configuration: MetricDefinitionDBConfiguration = appConfig.getMetricDefinitionDBConfiguration | ||
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| db = createDB(new LevelDbConfig { | ||
| override val createIfMissing: Boolean = true | ||
| override val verifyChecksums: Boolean = configuration.verifyChecksums | ||
| override val paranoidChecks: Boolean = configuration.performParanoidChecks | ||
| override val path: String = configuration.getDbDirPath | ||
| }) | ||
| isInitialized = true | ||
| } | ||
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| private def createDB(levelDbConfig: LevelDbConfig): DB = { | ||
| import levelDbConfig._ | ||
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| val options = new Options() | ||
| .createIfMissing(createIfMissing) | ||
| .paranoidChecks(paranoidChecks) // raise an error as soon as it detects an internal corruption | ||
| .verifyChecksums(verifyChecksums) // force checksum verification of all data that is read from the file system on behalf of a particular read | ||
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| Iq80DBFactory.factory.open(new File(path), options) | ||
| } | ||
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| override def close(): Unit = { | ||
| db.close() | ||
| } | ||
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| /** | ||
| * This function obtains the associated value to a key, if there exists one. | ||
| * | ||
| * @param key | ||
| * @return the value associated with the passed key. | ||
| */ | ||
| override def get(key: Key): Option[Value] = Option(db.get(key)) | ||
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| /** | ||
| * This function updates the DataSource by deleting, updating and inserting new (key-value) pairs. | ||
| * | ||
| * @param toRemove which includes all the keys to be removed from the DataSource. | ||
| * @param toUpsert which includes all the (key-value) pairs to be inserted into the DataSource. | ||
| * If a key is already in the DataSource its value will be updated. | ||
| */ | ||
| override def update(toRemove: Seq[Key], toUpsert: Seq[(Key, Value)]): Unit = { | ||
| val batch = db.createWriteBatch() | ||
| toRemove.foreach { key => batch.delete(key) } | ||
| toUpsert.foreach { item => batch.put(item._1, item._2) } | ||
| db.write(batch, new WriteOptions()) | ||
| } | ||
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| override def put(key: Key, value: Value): Unit = { | ||
| db.put(key, value) | ||
| } | ||
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| override def delete(key: Key): Unit = { | ||
| db.delete(key) | ||
| } | ||
| } | ||
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| trait LevelDbConfig { | ||
| val createIfMissing: Boolean | ||
| val paranoidChecks: Boolean | ||
| val verifyChecksums: Boolean | ||
| val path: String | ||
| } |
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| @@ -0,0 +1,57 @@ | ||
| /** | ||
| * 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.ambari.metrics.adservice.leveldb | ||
|
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| import java.io.File | ||
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| import org.apache.ambari.metrics.adservice.app.AnomalyDetectionAppConfig | ||
| import org.apache.ambari.metrics.adservice.configuration.MetricDefinitionDBConfiguration | ||
| import org.iq80.leveldb.util.FileUtils | ||
| import org.mockito.Mockito.when | ||
| import org.scalatest.{BeforeAndAfter, FunSuite, Matchers} | ||
| import org.scalatest.mockito.MockitoSugar | ||
|
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| class LevelDBDataSourceTest extends FunSuite with BeforeAndAfter with Matchers with MockitoSugar { | ||
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| var db: LevelDBDataSource = _ | ||
| var file : File = FileUtils.createTempDir("adservice-leveldb-test") | ||
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| before { | ||
| val appConfig: AnomalyDetectionAppConfig = mock[AnomalyDetectionAppConfig] | ||
| val mdConfig : MetricDefinitionDBConfiguration = mock[MetricDefinitionDBConfiguration] | ||
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| when(appConfig.getMetricDefinitionDBConfiguration).thenReturn(mdConfig) | ||
| when(mdConfig.verifyChecksums).thenReturn(true) | ||
| when(mdConfig.performParanoidChecks).thenReturn(false) | ||
| when(mdConfig.getDbDirPath).thenReturn(file.getAbsolutePath) | ||
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| db = new LevelDBDataSource(appConfig) | ||
| db.initialize() | ||
| } | ||
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| test("testOperations") { | ||
| db.put("Hello".getBytes(), "World".getBytes()) | ||
| assert(db.get("Hello".getBytes()).get.sameElements("World".getBytes())) | ||
| db.update(Seq("Hello".getBytes()), Seq(("Hello".getBytes(), "Mars".getBytes()))) | ||
| assert(db.get("Hello".getBytes()).get.sameElements("Mars".getBytes())) | ||
| } | ||
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| after { | ||
| FileUtils.deleteRecursively(file) | ||
| } | ||
| } |