fix #1608

deployer/src/main/java/com/alibaba/otter/canal/deployer/CanalStater.java

@@ -1,8 +1,12 @@
 package com.alibaba.otter.canal.deployer;
 
-import java.util.Map;
+import java.io.File;
+import java.io.FileFilter;
+import java.util.Arrays;
+import java.util.List;
 import java.util.Properties;
 
+import com.google.common.base.Joiner;
 import org.apache.commons.lang.StringUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -12,6 +16,8 @@ import com.alibaba.otter.canal.kafka.CanalKafkaProducer;
 import com.alibaba.otter.canal.rocketmq.CanalRocketMQProducer;
 import com.alibaba.otter.canal.server.CanalMQStarter;
 import com.alibaba.otter.canal.spi.CanalMQProducer;
+import com.google.common.base.Function;
+import com.google.common.collect.Lists;
 
 /**
  * Canal server 启动类
@@ -30,7 +36,7 @@ public class CanalStater {
 
     /**
      * 启动方法
-     * 
+     *
      * @param properties canal.properties 配置
      * @throws Throwable
      */
@@ -45,8 +51,38 @@ public class CanalStater {
         if (canalMQProducer != null) {
             // disable netty
             System.setProperty(CanalConstants.CANAL_WITHOUT_NETTY, "true");
-            System.setProperty(CanalConstants.CANAL_DESTINATIONS,
-                properties.getProperty(CanalConstants.CANAL_DESTINATIONS));
+
+            String autoScan = CanalController.getProperty(properties, CanalConstants.CANAL_AUTO_SCAN);
+            if ("true".equals(autoScan)) {
+                String rootDir = CanalController.getProperty(properties, CanalConstants.CANAL_CONF_DIR);
+                if (StringUtils.isEmpty(rootDir)) {
+                    rootDir = "../conf";
+                }
+                File rootdir = new File(rootDir);
+                if (rootdir.exists()) {
+                    File[] instanceDirs = rootdir.listFiles(new FileFilter() {
+
+                        public boolean accept(File pathname) {
+                            String filename = pathname.getName();
+                            return pathname.isDirectory() && !"spring".equalsIgnoreCase(filename);
+                        }
+                    });
+                    if (instanceDirs != null && instanceDirs.length > 0) {
+                        List<String> instances = Lists.transform(Arrays.asList(instanceDirs),
+                            new Function<File, String>() {
+
+                                @Override
+                                public String apply(File instanceDir) {
+                                    return instanceDir.getName();
+                                }
+                            });
+                        System.setProperty(CanalConstants.CANAL_DESTINATIONS, Joiner.on(",").join(instances));
+                    }
+                }
+            } else {
+                String destinations = CanalController.getProperty(properties, CanalConstants.CANAL_DESTINATIONS);
+                System.setProperty(CanalConstants.CANAL_DESTINATIONS, destinations);
+            }
         }
 
         logger.info("## start the canal server.");
@@ -80,7 +116,7 @@ public class CanalStater {
 
     /**
      * 销毁方法，远程配置变更时调用
-     * 
+     *
      * @throws Throwable
      */
     synchronized void destroy() throws Throwable {
@@ -101,7 +137,7 @@ public class CanalStater {
 
     /**
      * 构造MQ对应的配置
-     * 
+     *
      * @param properties canal.properties 配置
      * @return
      */