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METRON-1681 Decouple the ParserBolt from the Parse execution logic (m…
…errimanr) closes apache#1213
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...rm/metron-parsers/src/main/java/org/apache/metron/parsers/DefaultParserRunnerResults.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,71 @@ | ||
| /* | ||
| * 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.metron.parsers; | ||
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| import org.apache.metron.common.error.MetronError; | ||
| import org.json.simple.JSONObject; | ||
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| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import java.util.Objects; | ||
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| /** | ||
| * Default implementation of ParserRunnerResults. | ||
| */ | ||
| public class DefaultParserRunnerResults implements ParserRunnerResults<JSONObject> { | ||
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| private List<JSONObject> messages = new ArrayList<>(); | ||
| private List<MetronError> errors = new ArrayList<>(); | ||
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| public List<JSONObject> getMessages() { | ||
| return messages; | ||
| } | ||
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| public List<MetronError> getErrors() { | ||
| return errors; | ||
| } | ||
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| public void addMessage(JSONObject message) { | ||
| this.messages.add(message); | ||
| } | ||
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| public void addError(MetronError error) { | ||
| this.errors.add(error); | ||
| } | ||
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| public void addErrors(List<MetronError> errors) { | ||
| this.errors.addAll(errors); | ||
| } | ||
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| @Override | ||
| public boolean equals(Object o) { | ||
| if (this == o) return true; | ||
| if (o == null || getClass() != o.getClass()) return false; | ||
| ParserRunnerResults parserResult = (ParserRunnerResults) o; | ||
| return Objects.equals(messages, parserResult.getMessages()) && | ||
| Objects.equals(errors, parserResult.getErrors()); | ||
| } | ||
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| @Override | ||
| public int hashCode() { | ||
| int result = messages != null ? messages.hashCode() : 0; | ||
| result = 31 * result + (errors != null ? errors.hashCode() : 0); | ||
| return result; | ||
| } | ||
| } |
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60
metron-platform/metron-parsers/src/main/java/org/apache/metron/parsers/ParserRunner.java
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|---|---|---|
| @@ -0,0 +1,60 @@ | ||
| /** | ||
| * 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.metron.parsers; | ||
|
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| import org.apache.metron.common.configuration.ParserConfigurations; | ||
| import org.apache.metron.common.message.metadata.RawMessage; | ||
| import org.apache.metron.parsers.interfaces.MessageParserResult; | ||
| import org.apache.metron.stellar.dsl.Context; | ||
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| import java.util.List; | ||
| import java.util.Set; | ||
| import java.util.function.Supplier; | ||
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| /** | ||
| * A ParserRunner is responsible for initializing MessageParsers and parsing messages with the appropriate MessageParser. | ||
| * The information needed to initialize a MessageParser is supplied by the parser config supplier. After the parsers | ||
| * are initialized, the execute method can then be called for each message and will return a ParserRunnerResults object | ||
| * that contains a list of parsed messages and/or a list of errors. | ||
| * @param <T> The type of a successfully parsed message. | ||
| */ | ||
| public interface ParserRunner<T> { | ||
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| /** | ||
| * Return a list of all sensor types that can be parsed with this ParserRunner. | ||
| * @return Sensor types | ||
| */ | ||
| Set<String> getSensorTypes(); | ||
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| /** | ||
| * | ||
| * @param parserConfigSupplier Supplies parser configurations | ||
| * @param stellarContext Stellar context used to apply Stellar functions during field transformations | ||
| */ | ||
| void init(Supplier<ParserConfigurations> parserConfigSupplier, Context stellarContext); | ||
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| /** | ||
| * Parses a message and either returns the message or an error. | ||
| * @param sensorType Sensor type of the message | ||
| * @param rawMessage Raw message including metadata | ||
| * @param parserConfigurations Parser configurations | ||
| * @return ParserRunnerResults containing a list of messages and a list of errors | ||
| */ | ||
| ParserRunnerResults<T> execute(String sensorType, RawMessage rawMessage, ParserConfigurations parserConfigurations); | ||
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| } |
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