| /** |
| * 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.rest.service.impl; |
| |
| import java.nio.charset.Charset; |
| import java.nio.charset.StandardCharsets; |
| import oi.thekraken.grok.api.Grok; |
| import oi.thekraken.grok.api.Match; |
| import org.apache.commons.io.IOUtils; |
| import org.apache.directory.api.util.Strings; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.metron.rest.RestException; |
| import org.apache.metron.rest.model.GrokValidation; |
| import org.apache.metron.rest.service.GrokService; |
| import org.apache.metron.rest.service.HdfsService; |
| import org.springframework.beans.factory.annotation.Autowired; |
| import org.springframework.core.env.Environment; |
| import org.springframework.security.core.Authentication; |
| import org.springframework.security.core.context.SecurityContextHolder; |
| import org.springframework.stereotype.Service; |
| |
| import java.io.InputStreamReader; |
| import java.io.StringReader; |
| import java.util.Map; |
| |
| import static org.apache.metron.rest.MetronRestConstants.GROK_TEMP_PATH_SPRING_PROPERTY; |
| |
| @Service |
| public class GrokServiceImpl implements GrokService { |
| |
| private Environment environment; |
| |
| private Grok commonGrok; |
| |
| private HdfsService hdfsService; |
| |
| @Autowired |
| public GrokServiceImpl(Environment environment, Grok commonGrok, HdfsService hdfsService) { |
| this.environment = environment; |
| this.commonGrok = commonGrok; |
| this.hdfsService = hdfsService; |
| } |
| |
| @Override |
| public Map<String, String> getCommonGrokPatterns() { |
| return commonGrok.getPatterns(); |
| } |
| |
| @Override |
| public GrokValidation validateGrokStatement(GrokValidation grokValidation) throws RestException { |
| Map<String, Object> results; |
| try { |
| if (grokValidation.getPatternLabel() == null) { |
| throw new RestException("Pattern label is required"); |
| } |
| if (Strings.isEmpty(grokValidation.getStatement())) { |
| throw new RestException("Grok statement is required"); |
| } |
| Grok grok = new Grok(); |
| grok.addPatternFromReader(new InputStreamReader(getClass().getResourceAsStream( |
| "/patterns/common"), StandardCharsets.UTF_8)); |
| grok.addPatternFromReader(new StringReader(grokValidation.getStatement())); |
| String grokPattern = "%{" + grokValidation.getPatternLabel() + "}"; |
| grok.compile(grokPattern); |
| Match gm = grok.match(grokValidation.getSampleData()); |
| gm.captures(); |
| results = gm.toMap(); |
| results.remove(grokValidation.getPatternLabel()); |
| } catch (Exception e) { |
| throw new RestException(e); |
| } |
| grokValidation.setResults(results); |
| return grokValidation; |
| } |
| |
| @Override |
| public Path saveTemporary(String statement, String name) throws RestException { |
| if (statement != null) { |
| Path path = getTemporaryGrokRootPath(); |
| hdfsService.mkdirs(path); |
| hdfsService.write(new Path(path, name), statement.getBytes(StandardCharsets.UTF_8),null,null,null); |
| return path; |
| } else { |
| throw new RestException("A grokStatement must be provided"); |
| } |
| } |
| |
| public void deleteTemporary() throws RestException { |
| hdfsService.delete(getTemporaryGrokRootPath(), true); |
| } |
| |
| private Path getTemporaryGrokRootPath() { |
| String grokTempPath = environment.getProperty(GROK_TEMP_PATH_SPRING_PROPERTY); |
| Authentication authentication = SecurityContextHolder.getContext().getAuthentication(); |
| return new Path(grokTempPath, authentication.getName()); |
| } |
| |
| public String getStatementFromClasspath(String path) throws RestException { |
| try { |
| return IOUtils.toString(getClass().getResourceAsStream(path)); |
| } catch (Exception e) { |
| throw new RestException("Could not find a statement at path " + path); |
| } |
| } |
| |
| } |