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Code Issues Releases Wiki Activity

improve mysql sql parser formance

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This commit is contained in:
wenshao
2013-01-12 23:01:21 +08:00
parent e20247c503
commit 6c875e1ee0
11 changed files with 785 additions and 44 deletions
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src/test/java/com/alibaba/druid/sql/test/TestUtils.java
+67
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@@ -15,9 +15,13 @@
*/
package com.alibaba.druid.sql.test;
import java.lang.management.ManagementFactory;
import java.util.Arrays;
import java.util.List;
import javax.management.MBeanServer;
import javax.management.ObjectName;
import com.alibaba.druid.sql.ast.SQLStatement;
import com.alibaba.druid.sql.dialect.oracle.visitor.OracleOutputVisitor;
import com.alibaba.druid.sql.dialect.sqlserver.visitor.SQLServerOutputVisitor;
@@ -69,4 +73,67 @@ public class TestUtils {
return out.toString();
}
public static long getYoungGC() {
try {
// java.lang:type=GarbageCollector,name=G1 Young Generation
// java.lang:type=GarbageCollector,name=G1 Old Generation
MBeanServer mbeanServer = ManagementFactory.getPlatformMBeanServer();
ObjectName objectName;
if (mbeanServer.isRegistered(new ObjectName("java.lang:type=GarbageCollector,name=ParNew"))) {
objectName = new ObjectName("java.lang:type=GarbageCollector,name=ParNew");
} else if (mbeanServer.isRegistered(new ObjectName("java.lang:type=GarbageCollector,name=Copy"))) {
objectName = new ObjectName("java.lang:type=GarbageCollector,name=Copy");
} else if (mbeanServer.isRegistered(new ObjectName("java.lang:type=GarbageCollector,name=G1 Young Generation"))) {
objectName = new ObjectName("java.lang:type=GarbageCollector,name=G1 Young Generation");
} else {
objectName = new ObjectName("java.lang:type=GarbageCollector,name=PS Scavenge");
}
return (Long) mbeanServer.getAttribute(objectName, "CollectionCount");
} catch (Exception e) {
throw new RuntimeException("error");
}
}
public static long getYoungGCTime() {
try {
MBeanServer mbeanServer = ManagementFactory.getPlatformMBeanServer();
ObjectName objectName;
if (mbeanServer.isRegistered(new ObjectName("java.lang:type=GarbageCollector,name=ParNew"))) {
objectName = new ObjectName("java.lang:type=GarbageCollector,name=ParNew");
} else if (mbeanServer.isRegistered(new ObjectName("java.lang:type=GarbageCollector,name=Copy"))) {
objectName = new ObjectName("java.lang:type=GarbageCollector,name=Copy");
} else if (mbeanServer.isRegistered(new ObjectName("java.lang:type=GarbageCollector,name=G1 Young Generation"))) {
objectName = new ObjectName("java.lang:type=GarbageCollector,name=G1 Young Generation");
} else {
objectName = new ObjectName("java.lang:type=GarbageCollector,name=PS Scavenge");
}
return (Long) mbeanServer.getAttribute(objectName, "CollectionTime");
} catch (Exception e) {
throw new RuntimeException("error", e);
}
}
public static long getFullGC() {
try {
MBeanServer mbeanServer = ManagementFactory.getPlatformMBeanServer();
ObjectName objectName;
if (mbeanServer.isRegistered(new ObjectName("java.lang:type=GarbageCollector,name=ConcurrentMarkSweep"))) {
objectName = new ObjectName("java.lang:type=GarbageCollector,name=ConcurrentMarkSweep");
} else if (mbeanServer.isRegistered(new ObjectName("java.lang:type=GarbageCollector,name=MarkSweepCompact"))) {
objectName = new ObjectName("java.lang:type=GarbageCollector,name=MarkSweepCompact");
} else if (mbeanServer.isRegistered(new ObjectName("java.lang:type=GarbageCollector,name=G1 Old Generation"))) {
objectName = new ObjectName("java.lang:type=GarbageCollector,name=G1 Old Generation");
} else {
objectName = new ObjectName("java.lang:type=GarbageCollector,name=PS MarkSweep");
}
return (Long) mbeanServer.getAttribute(objectName, "CollectionCount");
} catch (Exception e) {
throw new RuntimeException("error");
}
}
}