add jmx support

src/main/java/com/alibaba/druid/wall/WallFilter.java

@@ -1,8 +1,10 @@
 package com.alibaba.druid.wall;
 
 import java.sql.SQLException;
+import java.util.Collections;
 import java.util.List;
 import java.util.Properties;
+import java.util.Set;
 
 import com.alibaba.druid.DruidRuntimeException;
 import com.alibaba.druid.filter.FilterAdapter;
@@ -20,7 +22,7 @@ import com.alibaba.druid.wall.spi.MySqlWallProvider;
 import com.alibaba.druid.wall.spi.OracleWallProvider;
 import com.alibaba.druid.wall.spi.SQLServerProvider;
 
-public class WallFilter extends FilterAdapter {
+public class WallFilter extends FilterAdapter implements WallFilterMBean {
 
     private final static Log LOG            = LogFactory.getLog(WallFilter.class);
 
@@ -32,8 +34,8 @@ public class WallFilter extends FilterAdapter {
 
     private WallConfig       config;
 
-    private boolean          logViolation   = false;
-    private boolean          throwException = true;
+    private volatile boolean logViolation   = false;
+    private volatile boolean throwException = true;
 
     @Override
     public void init(DataSourceProxy dataSource) {
@@ -59,7 +61,7 @@ public class WallFilter extends FilterAdapter {
             }
         } else if (JdbcUtils.SQL_SERVER.equals(dbType)) {
             provider = new SQLServerProvider(config);
-            
+
             if (config == null) {
                 config = new WallConfig(SQLServerProvider.DEFAULT_CONFIG_DIR);
             }
@@ -94,6 +96,20 @@ public class WallFilter extends FilterAdapter {
         this.throwException = throwException;
     }
 
+    public void clearProviderCache() {
+        if (provider != null) {
+            provider.clearCache();
+        }
+    }
+
+    public Set<String> getProviderWhiteList() {
+        if (provider == null) {
+            return Collections.emptySet();
+        }
+
+        return provider.getWhiteList();
+    }
+
     public WallProvider getProvider() {
         return provider;
     }
@@ -106,6 +122,10 @@ public class WallFilter extends FilterAdapter {
         this.config = config;
     }
 
+    public boolean isInited() {
+        return inited;
+    }
+
     public void checkInit() {
         if (inited) {
             throw new DruidRuntimeException("wall filter is inited");

src/main/java/com/alibaba/druid/wall/WallFilterMBean.java

@@ -0,0 +1,18 @@
+package com.alibaba.druid.wall;
+
+public interface WallFilterMBean {
+
+    String getDbType();
+
+    boolean isLogViolation();
+
+    void setLogViolation(boolean logViolation);
+
+    boolean isThrowException();
+    
+    void setThrowException(boolean throwException);
+    
+    boolean isInited();
+    
+    void clearProviderCache();
+}

src/main/java/com/alibaba/druid/wall/WallProvider.java

@@ -2,8 +2,10 @@ package com.alibaba.druid.wall;
 
 import java.util.ArrayList;
 import java.util.Collections;
+import java.util.HashSet;
 import java.util.LinkedHashMap;
 import java.util.List;
+import java.util.Set;
 import java.util.concurrent.locks.ReentrantReadWriteLock;
 
 import com.alibaba.druid.sql.ast.SQLStatement;
@@ -47,6 +49,20 @@ public abstract class WallProvider {
         }
     }
     
+    public Set<String> getWhiteList() {
+        Set<String> hashSet = new HashSet<String>();
+        lock.readLock().lock();
+        try {
+            if (whiteList != null) {
+                hashSet.addAll(whiteList.keySet());
+            }
+        } finally {
+            lock.readLock().unlock();
+        }
+        
+        return hashSet;
+    }
+    
     public void clearCache() {
         lock.writeLock().lock();
         try {