| /* |
| * Copyright (c) 2014 DataTorrent, Inc. ALL Rights Reserved. |
| * |
| * 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.datatorrent.contrib.splunk; |
| |
| import java.io.InputStream; |
| import javax.validation.constraints.NotNull; |
| import com.splunk.*; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import com.datatorrent.api.DefaultOutputPort; |
| import com.datatorrent.api.Context.OperatorContext; |
| import com.datatorrent.api.annotation.OutputPortFieldAnnotation; |
| |
| import com.datatorrent.lib.db.AbstractStoreInputOperator; |
| |
| /** |
| * This is the base implementation of a Splunk input adapter. |
| * Subclasses must implement the methods which convert Splunk event to tuples. |
| * <p> |
| * This is an abstract class. Sub-classes need to implement {@link #queryToRetrieveData()} and {@link #getTuple(Row)}. |
| * </p> |
| * @displayName Abstract Splunk Input |
| * @category Database |
| * @tags input operator |
| * |
| * @since 1.0.4 |
| */ |
| public abstract class AbstractSplunkInputOperator<T> extends AbstractStoreInputOperator<T, SplunkStore> { |
| |
| private static final Logger logger = LoggerFactory.getLogger(AbstractSplunkInputOperator.class); |
| @NotNull |
| protected String earliestTime; |
| protected String latestTime; |
| protected transient JobExportArgs exportArgs; |
| protected transient InputStream exportSearch; |
| protected transient MultiResultsReaderXml multiResultsReader; |
| |
| public void setEarliestTime(@NotNull String earliestTime) { |
| this.earliestTime = earliestTime; |
| } |
| |
| public void setLatestTime(@NotNull String latestTime) { |
| this.latestTime = latestTime; |
| } |
| |
| /** |
| * Any concrete class has to override this method to convert a Value of an Event into Tuple. |
| * |
| * @param value a single value that has been read from a splunk event. |
| * @return Tuple a tuples created from row which can be any Java object. |
| */ |
| public abstract T getTuple(String value); |
| |
| /** |
| * Any concrete class has to override this method to return the query string which will be used to |
| * retrieve data from splunk. |
| * |
| * @return Query string |
| */ |
| public abstract String queryToRetrieveData(); |
| |
| /** |
| * The output port on which tuples read from Splunk are emitted. |
| */ |
| public final transient DefaultOutputPort<T> outputPort = new DefaultOutputPort<T>(); |
| |
| @Override |
| public void setup(OperatorContext t1) |
| { |
| super.setup(t1); |
| exportArgs = new JobExportArgs(); |
| exportArgs.setEarliestTime(earliestTime); |
| exportArgs.setLatestTime(latestTime); |
| exportArgs.setSearchMode(JobExportArgs.SearchMode.NORMAL); |
| } |
| |
| /** |
| * This executes the search query to retrieve result from splunk. |
| * It then converts each event's value into tuple and emit that into output port. |
| */ |
| @Override |
| public void emitTuples() |
| { |
| String query = queryToRetrieveData(); |
| logger.debug(String.format("select statement: %s", query)); |
| |
| try { |
| exportSearch = store.getService().export(queryToRetrieveData(), exportArgs); |
| multiResultsReader = new MultiResultsReaderXml(exportSearch); |
| for (SearchResults searchResults : multiResultsReader) |
| { |
| for (Event event : searchResults) { |
| for (String key: event.keySet()){ |
| if(key.contains("raw")){ |
| T tuple = getTuple(event.get(key)); |
| outputPort.emit(tuple); |
| } |
| } |
| } |
| } |
| multiResultsReader.close(); |
| } catch (Exception e) { |
| store.disconnect(); |
| throw new RuntimeException(String.format("Error while running query: %s", query), e); |
| } |
| } |
| } |