Github user jjmeyer0 commented on a diff in the pull request:
https://github.com/apache/incubator-metron/pull/316#discussion_r99252325
--- Diff:
metron-interface/metron-rest/src/main/java/org/apache/metron/rest/service/impl/GrokServiceImpl.java
---
@@ -0,0 +1,112 @@
+/**
+ * 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 oi.thekraken.grok.api.Grok;
+import oi.thekraken.grok.api.Match;
+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.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.File;
+import java.io.FileWriter;
+import java.io.IOException;
+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;
+
+ @Autowired
+ public GrokServiceImpl(Environment environment, Grok commonGrok) {
+ this.environment = environment;
+ this.commonGrok = commonGrok;
+ }
+
+ @Override
+ public Map<String, String> getCommonGrokPatterns() {
+ return commonGrok.getPatterns();
+ }
+
+ @Override
+ public GrokValidation validateGrokStatement(GrokValidation
grokValidation) throws RestException {
+ Map<String, Object> results;
+ try {
+ String statement =
Strings.isEmpty(grokValidation.getStatement()) ? "" :
grokValidation.getStatement();
+
+ Grok grok = new Grok();
+ grok.addPatternFromReader(new
InputStreamReader(getClass().getResourceAsStream("/patterns/common")));
+ grok.addPatternFromReader(new StringReader(statement));
+ String patternLabel = statement.substring(0,
statement.indexOf(" "));
+ String grokPattern = "%{" + patternLabel + "}";
+ grok.compile(grokPattern);
+ Match gm = grok.match(grokValidation.getSampleData());
+ gm.captures();
+ results = gm.toMap();
+ results.remove(patternLabel);
+ } catch (StringIndexOutOfBoundsException e) {
+ throw new RestException("A pattern label must be included (eg.
PATTERN_LABEL %{PATTERN:field} ...)", e.getCause());
+ } catch (Exception e) {
+ throw new RestException(e);
+ }
+ grokValidation.setResults(results);
+ return grokValidation;
+ }
+
+ @Override
+ public File saveTemporary(String statement, String name) throws
RestException {
+ if (statement != null) {
+ try {
+ File grokDirectory = new File(getTemporaryGrokRootPath());
+ if (!grokDirectory.exists()) {
+ grokDirectory.mkdirs();
+ }
+ File path = new File(grokDirectory, name);
+ FileWriter fileWriter = new FileWriter(new
File(grokDirectory, name));
--- End diff --
There may be an issue where the same `name` is passed in causing files to
be overwritten. I think we should use Java's `File. createTempFile`. Does this
make sense to do this?
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