Add tool to replay (uncompressed) journal files.

ChangeLog

@@ -1,3 +1,6 @@
+* Fri Mar 22 2019 Dave Benson <david.benson> 2.2.2
+- add ReplayJournal program mostly to use in testing emitters
+
 * Fri Jan 11 2019 Dave Benson <david.benson> 2.2.1
 - support for registration of new EmitterGroup to support
   plugins that render to alternate targets (which aren't necessarily

pom.xml

@@ -3,7 +3,7 @@
   <groupId>org.lwes</groupId>
   <artifactId>lwes-java</artifactId>
   <packaging>jar</packaging>
-  <version>2.2.1</version>
+  <version>2.2.2</version>
   <name>lwes-java</name>
   <description>Lightweight event system, java implementation</description>
   <url>http://lwes.org</url>
@@ -161,8 +161,8 @@
         <artifactId>maven-compiler-plugin</artifactId>
         <version>2.3.2</version>
         <configuration>
-          <source>1.5</source>
-          <target>1.5</target>
+          <source>1.6</source>
+          <target>1.6</target>
         </configuration>
       </plugin>
       <plugin>

src/main/java/org/lwes/emitter/ReplayJournal.java

@@ -0,0 +1,66 @@
+package org.lwes.emitter;
+
+import org.kohsuke.args4j.CmdLineException;
+import org.kohsuke.args4j.CmdLineParser;
+import org.kohsuke.args4j.Option;
+import org.lwes.Event;
+import org.lwes.EventFactory;
+import org.lwes.emitter.EmitterGroupBuilder;
+import org.lwes.emitter.EmitterGroup;
+import java.io.FileReader;
+import java.io.FileInputStream;
+import java.io.BufferedInputStream;
+import java.util.Properties;
+
+
+public class ReplayJournal {
+
+  @Option(name = "-i", usage = "journal file", required = true, metaVar = "FILE")
+  String inputFilename;
+
+  @Option(name = "-n", usage = "repeat count", metaVar = "COUNT")
+  int repeatCount = 1;
+
+  @Option(name = "-sleep", usage = "milliseconds to sleep between events", metaVar = "MILLISECONDS")
+  int sleepMillis = 0;
+
+  @Option(name = "-group", usage = "event emitter group name", required = true)
+  String groupName;
+
+  @Option(name = "-properties", usage = "properties file", required = true)
+  String propertiesFilename;
+
+  public static EventFactory factory = new EventFactory();
+
+  private void run() throws Exception {
+    Properties props = new Properties();
+    props.load(new FileReader(propertiesFilename));
+    EmitterGroup group = EmitterGroupBuilder.createGroup(props, groupName, factory);
+    byte[] header = new byte[22];
+    for (int i = 0; repeatCount < 0 || i < repeatCount; i++) {
+      FileInputStream file = new FileInputStream(inputFilename);
+      BufferedInputStream input = new BufferedInputStream(file);
+      while (input.read(header) == 22) {
+        int size = (((int)header[0] << 8) & 0xff00)
+                 | (((int)header[1] << 0) & 0x00ff);
+        byte[] eventData = new byte[size];
+        if (input.read(eventData) != eventData.length) {
+          throw new RuntimeException("bad journal");
+        }
+        Event event = factory.createEvent(eventData, false);
+        group.emitToGroup(event);
+        if (sleepMillis != 0)
+          Thread.sleep(sleepMillis);
+      }
+    }
+    System.err.println("no more data: returning");
+  }
+
+  public static void main(String[] args) throws Exception {
+    ReplayJournal replayer = new ReplayJournal();
+    CmdLineParser parser = new CmdLineParser(replayer);
+    parser.parseArgument(args);
+    replayer.run();
+  }
+}
+