Incorporate the ECOMP SDC Artefact Generator code

[aai/babel.git] / src / test / java / org / onap / aai / babel / logging / LogReader.java

diff --git a/src/test/java/org/onap/aai/babel/logging/LogReader.java b/src/test/java/org/onap/aai/babel/logging/LogReader.java
new file mode 100644 (file)
index 0000000..c2a8e64
--- /dev/null
+++ b/src/test/java/org/onap/aai/babel/logging/LogReader.java
@@ -0,0 +1,102 @@
+/**
+ * ============LICENSE_START=======================================================
+ * org.onap.aai
+ * ================================================================================
+ * Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.
+ * Copyright © 2017-2018 European Software Marketing Ltd.
+ * ================================================================================
+ * 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.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.aai.babel.logging;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileReader;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Optional;
+import java.util.concurrent.TimeUnit;
+import org.apache.commons.lang.time.StopWatch;
+import org.junit.Assert;
+
+public class LogReader {
+
+    private Map<String, Path> cachedLogMap = new HashMap<>();
+    private Map<String, BufferedReader> readersMap = new HashMap<>();
+    private BufferedReader cachedReader;
+
+    public LogReader(String logDirectory, String logFilePrefix) throws IOException {
+        cachedReader = getReader(logDirectory, logFilePrefix);
+    }
+
+    private BufferedReader getReader(String logDirectory, String logFilePrefix) throws IOException {
+        BufferedReader reader = readersMap.get(logFilePrefix);
+        if (reader == null) {
+            reader = new BufferedReader(new FileReader(getLogFile(logDirectory, logFilePrefix)));
+            while (reader.readLine() != null) {
+                // Consume all lines
+            }
+            readersMap.put(logFilePrefix, reader);
+        }
+        return reader;
+    }
+
+    /**
+     * @param logDirectory
+     * @return the most recently created log file.
+     * @throws IOException
+     */
+    public File getLogFile(String logDirectory, String filenamePrefix) throws IOException {
+        Path cachedLog = cachedLogMap.get(filenamePrefix);
+
+        if (cachedLog == null) {
+            Optional<Path> latestFilePath = Files.list(Paths.get(logDirectory))
+                    .filter(f -> Files.isDirectory(f) == false && f.getFileName().toString().startsWith(filenamePrefix))
+                    .max((f1, f2) -> (int) (f1.toFile().lastModified() - f2.toFile().lastModified()));
+            if (latestFilePath.isPresent()) {
+                cachedLog = latestFilePath.get();
+            } else {
+                throw new IOException("No validation log files were found!");
+            }
+        }
+        return cachedLog.toFile();
+    }
+
+    /**
+     * @return new lines appended to the log file
+     * @throws IOException
+     */
+    public String getNewLines() throws IOException {
+        StopWatch stopwatch = new StopWatch();
+        stopwatch.start();
+
+        while (!cachedReader.ready()) {
+            if (stopwatch.getTime() > TimeUnit.SECONDS.toMillis(30)) {
+                Assert.fail("Test took too long");
+            }
+            // else keep waiting
+        }
+
+        StringBuilder lines = new StringBuilder();
+        String line;
+        while ((line = cachedReader.readLine()) != null) {
+            lines.append(line).append(System.lineSeparator());
+        }
+        return lines.toString();
+    }
+}