[ROCKETMQ-30] Fixed method signature for Message Filter example and class...

[ROCKETMQ-30] Fixed method signature for Message Filter example and class loading from resources, closes apache/incubator-rocketmq#27

example/src/main/java/org/apache/rocketmq/example/filter/Consumer.java

@@ -16,6 +16,7 @@
  */
 package org.apache.rocketmq.example.filter;
 
+import java.io.File;
 import java.util.List;
 import org.apache.rocketmq.client.consumer.DefaultMQPushConsumer;
 import org.apache.rocketmq.client.consumer.listener.ConsumeConcurrentlyContext;
@@ -30,8 +31,11 @@ public class Consumer {
     public static void main(String[] args) throws InterruptedException, MQClientException {
         DefaultMQPushConsumer consumer = new DefaultMQPushConsumer("ConsumerGroupNamecc4");
 
-        String filterCode = MixAll.file2String("/home/admin/MessageFilterImpl.java");
-        consumer.subscribe("TopicFilter7", "org.apache.rocketmq.example.filter.MessageFilterImpl",
+        ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
+        File classFile = new File(classLoader.getResource("MessageFilterImpl.java").getFile());
+
+        String filterCode = MixAll.file2String(classFile);
+        consumer.subscribe("TopicTest", "org.apache.rocketmq.example.filter.MessageFilterImpl",
             filterCode);
 
         consumer.registerMessageListener(new MessageListenerConcurrently() {

example/src/main/resources/MessageFilterImpl.java

@@ -17,13 +17,14 @@
 
 package org.apache.rocketmq.example.filter;
 
+import org.apache.rocketmq.common.filter.FilterContext;
 import org.apache.rocketmq.common.filter.MessageFilter;
 import org.apache.rocketmq.common.message.MessageExt;
 
 public class MessageFilterImpl implements MessageFilter {
 
     @Override
-    public boolean match(MessageExt msg) {
+    public boolean match(MessageExt msg, FilterContext context) {
         String property = msg.getProperty("SequenceId");
         if (property != null) {
             int id = Integer.parseInt(property);