code: /*
   * 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.skywalking.oap.log.analyzer.dsl.spec.filter;
  
  import com.fasterxml.jackson.core.type.TypeReference;
  import com.google.protobuf.Message;
  import com.google.protobuf.TextFormat;
  import groovy.lang.Closure;
  import groovy.lang.DelegatesTo;
  import java.util.Arrays;
  import java.util.List;
  import java.util.Map;
  import java.util.Optional;
  import java.util.concurrent.atomic.AtomicReference;
  
  import org.apache.skywalking.apm.network.logging.v3.LogData;
  import org.apache.skywalking.oap.log.analyzer.dsl.Binding;
  import org.apache.skywalking.oap.log.analyzer.dsl.spec.AbstractSpec;
  import org.apache.skywalking.oap.log.analyzer.dsl.spec.extractor.ExtractorSpec;
  import org.apache.skywalking.oap.log.analyzer.dsl.spec.parser.JsonParserSpec;
  import org.apache.skywalking.oap.log.analyzer.dsl.spec.parser.TextParserSpec;
  import org.apache.skywalking.oap.log.analyzer.dsl.spec.parser.YamlParserSpec;
  import org.apache.skywalking.oap.log.analyzer.dsl.spec.sink.SinkSpec;
  import org.apache.skywalking.oap.log.analyzer.provider.LogAnalyzerModuleConfig;
  import org.apache.skywalking.oap.log.analyzer.provider.log.listener.LogSinkListenerFactory;
  import org.apache.skywalking.oap.log.analyzer.provider.log.listener.RecordSinkListener;
  import org.apache.skywalking.oap.log.analyzer.provider.log.listener.TrafficSinkListener;
  import org.apache.skywalking.oap.server.core.source.Log;
  
  import org.apache.skywalking.oap.server.library.module.ModuleManager;
  import org.apache.skywalking.oap.server.library.module.ModuleStartException;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class FilterSpec extends AbstractSpec {
      private static final Logger LOGGER = LoggerFactory.getLogger(FilterSpec.class);
  
      private final List<LogSinkListenerFactory> sinkListenerFactories;
  
      private final TextParserSpec textParser;
  
      private final JsonParserSpec jsonParser;
  
      private final YamlParserSpec yamlParser;
  
      private final ExtractorSpec extractor;
  
      private final SinkSpec sink;
  
      private final TypeReference<Map<String, Object>> parsedType;
  
      public FilterSpec(final ModuleManager moduleManager,
                        final LogAnalyzerModuleConfig moduleConfig) throws ModuleStartException {
          super(moduleManager, moduleConfig);
  
          parsedType = new TypeReference<Map<String, Object>>() {
          };
  
          sinkListenerFactories = Arrays.asList(
              new RecordSinkListener.Factory(moduleManager(), moduleConfig()),
              new TrafficSinkListener.Factory(moduleManager(), moduleConfig())
          );
  
          textParser = new TextParserSpec(moduleManager(), moduleConfig());
          jsonParser = new JsonParserSpec(moduleManager(), moduleConfig());
          yamlParser = new YamlParserSpec(moduleManager(), moduleConfig());
  
          extractor = new ExtractorSpec(moduleManager(), moduleConfig());
  
          sink = new SinkSpec(moduleManager(), moduleConfig());
      }
  
      @SuppressWarnings("unused")
      public void text(@DelegatesTo(TextParserSpec.class) final Closure<?> cl) {
          if (BINDING.get().shouldAbort()) {
              return;
          }
          cl.setDelegate(textParser);
          cl.call();
      }
  
      @SuppressWarnings("unused")
      public void json(@DelegatesTo(JsonParserSpec.class) final Closure<?> cl) {
          if (BINDING.get().shouldAbort()) {
              return;
          }
          cl.setDelegate(jsonParser);
          cl.call();
  
          final LogData.Builder logData = BINDING.get().log();
          try {
  
              final Map<String, Object> parsed = jsonParser.create().readValue(
                  logData.getBody().getJson().getJson(), parsedType
              );
  
              BINDING.get().parsed(parsed);
          } catch (final Exception e) {
              if (jsonParser.abortOnFailure()) {
                  BINDING.get().abort();
              }
          }
      }
  
      @SuppressWarnings({"unused"})
      public void yaml(@DelegatesTo(YamlParserSpec.class) final Closure<?> cl) {
          if (BINDING.get().shouldAbort()) {
              return;
          }
          cl.setDelegate(yamlParser);
          cl.call();
  
          final LogData.Builder logData = BINDING.get().log();
          try {
              final Map<String, Object> parsed = yamlParser.create().load(
                      logData.getBody().getYaml().getYaml()
              );
  
              BINDING.get().parsed(parsed);
          } catch (final Exception e) {
              if (yamlParser.abortOnFailure()) {
                  BINDING.get().abort();
              }
          }
      }
  
      @SuppressWarnings("unused")
      public void extractor(@DelegatesTo(ExtractorSpec.class) final Closure<?> cl) {
          if (BINDING.get().shouldAbort()) {
              return;
          }
          cl.setDelegate(extractor);
          cl.call();
      }
  
      @SuppressWarnings("unused")
      public void sink(@DelegatesTo(SinkSpec.class) final Closure<?> cl) {
          if (BINDING.get().shouldAbort()) {
              return;
          }
          cl.setDelegate(sink);
          cl.call();
  
          final Binding b = BINDING.get();
          final LogData.Builder logData = b.log();
          final Message extraLog = b.extraLog();
  
          if (!b.shouldSave()) {
              if (LOGGER.isDebugEnabled()) {
                  LOGGER.debug("Log is dropped: {}", TextFormat.shortDebugString(logData));
              }
              return;
          }
  
          final Optional<AtomicReference<Log>> container = BINDING.get().logContainer();
          if (container.isPresent()) {
              sinkListenerFactories.stream()
                       .map(LogSinkListenerFactory::create)
                       .filter(it -> it instanceof RecordSinkListener)
                       .map(it -> it.parse(logData, extraLog))
                       .map(it -> (RecordSinkListener) it)
                       .map(RecordSinkListener::getLog)
                       .findFirst()
                       .ifPresent(log -> container.get().set(log));
          } else {
              sinkListenerFactories.stream()
                       .map(LogSinkListenerFactory::create)
                       .forEach(it -> it.parse(logData, extraLog).build());
          }
      }
  
      @SuppressWarnings("unused")
      public void filter(final Closure<?> cl) {
          cl.call();
      }
  }
  