Add:

* VersionUtil to get version from jar
* sentinel-transport-netty-http will also retry when port specified has been used

Fix:
* LogBase repackage and support variable arguments
* SentinelConfig remove duplicated JVM properties overriding

pom.xml

@@ -58,6 +58,7 @@
         <maven.deploy.version>2.8.2</maven.deploy.version>
         <maven.gpg.version>1.6</maven.gpg.version>
         <maven.jacoco.version>0.8.1</maven.jacoco.version>
+        <maven.jar.version>3.1.0</maven.jar.version>
     </properties>
 
     <modules>
@@ -182,6 +183,13 @@
                 </executions>
             </plugin>
         </plugins>
+        <pluginManagement>
+        	<plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-jar-plugin</artifactId>
+                <version>${maven.jar.version}</version>
+            </plugin>
+        </pluginManagement>
     </build>
 
     <profiles>

sentinel-core/pom.xml

@@ -24,5 +24,19 @@
             <scope>test</scope>
         </dependency>
     </dependencies>
-
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-jar-plugin</artifactId>
+                <configuration>
+                    <archive>
+                        <manifestEntries>
+                            <Implementation-Version>${project.version}</Implementation-Version>
+                        </manifestEntries>
+                    </archive>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
 </project>

sentinel-core/src/main/java/com/alibaba/csp/sentinel/Constants.java

@@ -20,6 +20,7 @@
 import com.alibaba.csp.sentinel.node.EntranceNode;
 import com.alibaba.csp.sentinel.slotchain.StringResourceWrapper;
 import com.alibaba.csp.sentinel.slots.system.SystemRule;
+import com.alibaba.csp.sentinel.util.VersionUtil;
 
 /**
  * @author qinan.qn
@@ -28,7 +29,7 @@
  */
 public final class Constants {
 
-    public static final String SENTINEL_VERSION = "0.2.1";
+    public static final String SENTINEL_VERSION = VersionUtil.getVersion("0.2.1");
 
     public final static int MAX_CONTEXT_NAME_SIZE = 2000;
     public final static int MAX_SLOT_CHAIN_SIZE = 6000;

sentinel-core/src/main/java/com/alibaba/csp/sentinel/config/SentinelConfig.java

@@ -77,15 +77,6 @@ private static void loadProps() {
 
                 for (Object key : fileProps.keySet()) {
                     SentinelConfig.setConfig((String)key, (String)fileProps.get(key));
-                    try {
-                        String systemValue = System.getProperty((String)key);
-                        if (!StringUtil.isEmpty(systemValue)) {
-                            SentinelConfig.setConfig((String)key, systemValue);
-                        }
-                    } catch (Exception e) {
-                        RecordLog.info(e.getMessage(), e);
-                    }
-                    RecordLog.info(key + " value: " + SentinelConfig.getConfig((String)key));
                 }
             }
         } catch (Throwable ioe) {
@@ -94,7 +85,13 @@ private static void loadProps() {
 
         // JVM parameter override file config.
         for (Map.Entry<Object, Object> entry : System.getProperties().entrySet()) {
-            SentinelConfig.setConfig(entry.getKey().toString(), entry.getValue().toString());
+            String configKey = entry.getKey().toString();
+            String configValue = entry.getValue().toString();
+            String configValueOld = getConfig(configKey);
+            SentinelConfig.setConfig(configKey, configValue);
+            if (configValueOld != null) {
+                RecordLog.info("JVM parameter overrides {0}: {1} -> {2}", configKey, configValueOld, configValue);
+            }
         }
     }
 

sentinel-core/src/main/java/com/alibaba/csp/sentinel/log/CommandCenterLog.java

@@ -40,18 +40,19 @@ public static void resetLogBaseDir(String baseDir) {
         logHandler = makeLogger(FILE_NAME, heliumRecordLog);
     }
 
-    public static void info(String msg) {
-        LoggerUtils.disableOtherHandlers(heliumRecordLog, logHandler);
-        heliumRecordLog.log(Level.INFO, msg);
+    public static void info(String detail, Object... params) {
+        log(heliumRecordLog, logHandler, Level.INFO, detail, params);
     }
 
-    public static void info(String msg, Throwable e) {
-        LoggerUtils.disableOtherHandlers(heliumRecordLog, logHandler);
-        heliumRecordLog.log(Level.INFO, msg, e);
+    public static void info(String detail, Throwable e) {
+        log(heliumRecordLog, logHandler, Level.INFO, detail, e);
     }
 
-    public static void warn(String msg, Throwable e) {
-        LoggerUtils.disableOtherHandlers(heliumRecordLog, logHandler);
-        heliumRecordLog.log(Level.WARNING, msg, e);
+    public static void warn(String detail, Object... params) {
+        log(heliumRecordLog, logHandler, Level.WARNING, detail, params);
+    }
+
+    public static void warn(String detail, Throwable e) {
+        log(heliumRecordLog, logHandler, Level.WARNING, detail, e);
     }
 }

sentinel-core/src/main/java/com/alibaba/csp/sentinel/log/LogBase.java

@@ -24,6 +24,7 @@
 import com.alibaba.csp.sentinel.util.PidUtil;
 
 /**
+ * 
  * @author leyou
  */
 public class LogBase {
@@ -36,6 +37,26 @@ public class LogBase {
         String userHome = System.getProperty(USER_HOME);
         setLogBaseDir(userHome);
     }
+
+    protected static void log(Logger logger, Handler handler, Level level, String detail, Object... params) {
+        if (detail == null) {
+            return;
+        }
+        LoggerUtils.disableOtherHandlers(logger, handler);
+        if (params.length == 0) {
+            logger.log(level, detail);
+        } else {
+            logger.log(level, detail, params);
+        }
+    }
+
+    protected static void log(Logger logger, Handler handler, Level level, String detail, Throwable throwable) {
+        if (detail == null) {
+            return;
+        }
+        LoggerUtils.disableOtherHandlers(logger, handler);
+        logger.log(level, detail, throwable);
+    }
 
     /**
      * Get log file base directory path, the returned path is guaranteed end with {@link File#separator}

sentinel-core/src/main/java/com/alibaba/csp/sentinel/log/RecordLog.java

@@ -32,7 +32,7 @@ public class RecordLog extends LogBase {
     static {
         logHandler = makeLogger(FILE_NAME, heliumRecordLog);
     }
-
+    
     /**
      * Change log dir, the dir will be created if not exits
      */
@@ -41,23 +41,19 @@ public static void resetLogBaseDir(String baseDir) {
         logHandler = makeLogger(FILE_NAME, heliumRecordLog);
     }
 
-    public static void info(String detail) {
-        LoggerUtils.disableOtherHandlers(heliumRecordLog, logHandler);
-        heliumRecordLog.log(Level.INFO, detail);
+    public static void info(String detail, Object... params) {
+        log(heliumRecordLog, logHandler, Level.INFO, detail, params);
     }
 
     public static void info(String detail, Throwable e) {
-        LoggerUtils.disableOtherHandlers(heliumRecordLog, logHandler);
-        heliumRecordLog.log(Level.INFO, detail, e);
+        log(heliumRecordLog, logHandler, Level.INFO, detail, e);
     }
 
-    public static void warn(String detail) {
-        LoggerUtils.disableOtherHandlers(heliumRecordLog, logHandler);
-        heliumRecordLog.log(Level.WARNING, detail);
+    public static void warn(String detail, Object... params) {
+        log(heliumRecordLog, logHandler, Level.WARNING, detail, params);
     }
 
     public static void warn(String detail, Throwable e) {
-        LoggerUtils.disableOtherHandlers(heliumRecordLog, logHandler);
-        heliumRecordLog.log(Level.WARNING, detail, e);
+        log(heliumRecordLog, logHandler, Level.WARNING, detail, e);
     }
 }

sentinel-core/src/main/java/com/alibaba/csp/sentinel/util/VersionUtil.java

@@ -0,0 +1,36 @@
+/*
+ * Copyright 1999-2018 Alibaba Group Holding 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.
+ */
+package com.alibaba.csp.sentinel.util;
+
+import com.alibaba.csp.sentinel.log.RecordLog;
+
+/**
+ * Get Sentinel version from MANIFEST.MF
+ * 
+ * @author jason
+ * @since 0.2.1
+ */
+public class VersionUtil {
+    public static String getVersion(String defaultVersion) {
+        try {
+            String version = VersionUtil.class.getPackage().getImplementationVersion();
+            return version == null || version.length() == 0 ? defaultVersion : version;
+        } catch (Throwable e) {
+            RecordLog.warn("return default version, ignore exception", e);
+            return defaultVersion;
+        }
+    }
+}

sentinel-core/src/test/java/com/alibaba/csp/sentinel/util/VersionUtilTest.java

@@ -0,0 +1,15 @@
+package com.alibaba.csp.sentinel.util;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class VersionUtilTest {
+    @Test
+    public void versionTest() {
+        String version = VersionUtil.getVersion("1.0");
+        /**
+         * manifest cannot be load before package
+         */
+        Assert.assertEquals("1.0", version);
+    }
+}

sentinel-transport/sentinel-transport-common/pom.xml

@@ -20,5 +20,10 @@
             <groupId>com.alibaba</groupId>
             <artifactId>fastjson</artifactId>
         </dependency>
+        <dependency>
+        	<groupId>junit</groupId>
+        	<artifactId>junit</artifactId>
+        	<scope>test</scope>
+        </dependency>
     </dependencies>
 </project>

sentinel-transport/sentinel-transport-netty-http/src/main/java/com/alibaba/csp/sentinel/transport/command/netty/HttpServer.java

@@ -18,21 +18,25 @@
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.TimeUnit;
 
-import com.alibaba.csp.sentinel.transport.config.TransportConfig;
 import com.alibaba.csp.sentinel.command.CommandHandler;
 import com.alibaba.csp.sentinel.log.CommandCenterLog;
+import com.alibaba.csp.sentinel.log.RecordLog;
+import com.alibaba.csp.sentinel.transport.config.TransportConfig;
 import com.alibaba.csp.sentinel.util.StringUtil;
 
 import io.netty.bootstrap.ServerBootstrap;
 import io.netty.channel.Channel;
+import io.netty.channel.ChannelFuture;
 import io.netty.channel.EventLoopGroup;
 import io.netty.channel.nio.NioEventLoopGroup;
 import io.netty.channel.socket.nio.NioServerSocketChannel;
 
 /**
  * @author Eric Zhao
  */
+@SuppressWarnings("rawtypes")
 public final class HttpServer {
 
     private static final int DEFAULT_PORT = 8719;
@@ -60,13 +64,40 @@ public void start() throws Exception {
             } catch (Exception e) {
                 throw new IllegalArgumentException("Illegal port: " + TransportConfig.getPort());
             }
-            channel = b.bind(port).sync().channel();
+
+            int retryCount = 0;
+            ChannelFuture channelFuture = null;
+            // loop for an successful binding
+            while (true) {
+                int newPort = getNewPort(port, retryCount);
+                try {
+                    channelFuture = b.bind(newPort).sync();
+                    TransportConfig.setRuntimePort(newPort);
+                    break;
+                } catch (Exception e) {
+                    TimeUnit.MILLISECONDS.sleep(30);
+                    RecordLog.warn("netty server bind error, port={0}, retry={1}", newPort, retryCount);
+                    retryCount ++;
+                }
+            }
+            channel = channelFuture.channel();
             channel.closeFuture().sync();
         } finally {
             workerGroup.shutdownGracefully();
             bossGroup.shutdownGracefully();
         }
     }
+
+    /**
+     * increase port number every 3 tries
+     * 
+     * @param basePort
+     * @param retryCount
+     * @return
+     */
+    private int getNewPort(int basePort, int retryCount) {
+        return basePort + retryCount / 3;
+    }
 
     public void close() {
         channel.close();