[GISSIP-7] add log4j.properties and main/resources; rename test package to org.apache.gossip

src/test/java/org/apache/gossip/StartupSettingsTest.java

@@ -0,0 +1,95 @@
+/*
+ * 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.gossip;
+
+import org.apache.gossip.GossipMember;
+import org.apache.gossip.GossipService;
+import org.apache.gossip.GossipSettings;
+import org.apache.gossip.StartupSettings;
+import org.apache.log4j.Logger;
+import org.json.JSONException;
+import org.junit.Test;
+
+import io.teknek.tunit.TUnit;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.util.ArrayList;
+import java.util.UUID;
+import java.util.concurrent.Callable;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Tests support of using {@code StartupSettings} and thereby reading
+ * setup config from file.
+ */
+public class StartupSettingsTest {
+  private static final Logger log = Logger.getLogger( StartupSettingsTest.class );
+  private static final String CLUSTER = UUID.randomUUID().toString();
+
+  @Test
+  public void testUsingSettingsFile() throws IOException, InterruptedException, JSONException, URISyntaxException {
+    File settingsFile = File.createTempFile("gossipTest",".json");
+    log.debug( "Using settings file: " + settingsFile.getAbsolutePath() );
+    settingsFile.deleteOnExit();
+    writeSettingsFile(settingsFile);
+    URI uri = new URI("udp://" + "127.0.0.1" + ":" + 50000);
+    final GossipService firstService = new GossipService(
+            CLUSTER, uri, UUID.randomUUID().toString(),
+      new ArrayList<GossipMember>(), new GossipSettings(), null);
+    
+    firstService.start();
+    
+    TUnit.assertThat(new Callable<Integer> (){
+      public Integer call() throws Exception {
+          return firstService.get_gossipManager().getMemberList().size();
+      }}).afterWaitingAtMost(30, TimeUnit.SECONDS).isEqualTo(0);
+    final GossipService serviceUnderTest = new GossipService(
+            StartupSettings.fromJSONFile( settingsFile )
+          );
+    serviceUnderTest.start();
+    TUnit.assertThat(new Callable<Integer> (){
+      public Integer call() throws Exception {
+          return serviceUnderTest.get_gossipManager().getMemberList().size();
+      }}).afterWaitingAtMost(10, TimeUnit.SECONDS).isEqualTo(1);
+    firstService.shutdown();
+    serviceUnderTest.shutdown();
+  }
+
+  private void writeSettingsFile( File target ) throws IOException {
+    String settings =
+            "[{\n" + // It is odd that this is meant to be in an array, but oh well.
+            "  \"cluster\":\"" + CLUSTER + "\",\n" +
+            "  \"id\":\"" + UUID.randomUUID() + "\",\n" +
+            "  \"uri\":\"udp://127.0.0.1:50001\",\n" +
+            "  \"gossip_interval\":1000,\n" +
+            "  \"cleanup_interval\":10000,\n" +
+            "  \"members\":[\n" +
+            "    {\"cluster\": \"" + CLUSTER + "\",\"uri\":\"udp://127.0.0.1:5000\"}\n" +
+            "  ]\n" +
+            "}]";
+
+    log.info( "Using settings file with contents of:\n---\n" + settings + "\n---" );
+    FileOutputStream output = new FileOutputStream(target);
+    output.write( settings.getBytes() );
+    output.close();
+  }
+}