Package org.apache.hadoop.hbase.util

Class JSONBean

java.lang.Object

org.apache.hadoop.hbase.util.JSONBean

@Private
public class JSONBean
extends Object

Utility for doing JSON and MBeans.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	JSONBean.Writer	Use dumping out mbeans as JSON.

Field Summary

Fields

Modifier and Type	Field	Description
private static final String	ASTERICK
private static final String	COMMA
private static final org.apache.hbase.thirdparty.com.google.gson.Gson	GSON
private static final org.slf4j.Logger	LOG

Constructor Summary

Constructors

Constructor	Description
JSONBean()

Method Summary

Modifier and Type	Method	Description
static void	dumpAllBeans()	Dump out all registered mbeans as json on System.out.
JSONBean.Writer	open(PrintWriter writer)	Notice that, closing the return JSONBean.Writer will not close the writer passed in, you still need to close the writer by yourself.
private static int	write(org.apache.hbase.thirdparty.com.google.gson.stream.JsonWriter writer, MBeanServer mBeanServer, ObjectName qry, String attribute, boolean description, ObjectName excluded)	Returns Return non-zero if failed to find bean.
private static void	writeAttribute(org.apache.hbase.thirdparty.com.google.gson.stream.JsonWriter writer, String attName, String descriptionStr, Object value)
private static void	writeAttribute(org.apache.hbase.thirdparty.com.google.gson.stream.JsonWriter writer, MBeanServer mBeanServer, ObjectName oname, boolean description, Pattern[] pattern, MBeanAttributeInfo attr)
private static void	writeObject(org.apache.hbase.thirdparty.com.google.gson.stream.JsonWriter writer, Object value)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

COMMA

private static final String COMMA

See Also:

• Constant Field Values

ASTERICK

private static final String ASTERICK

See Also:

• Constant Field Values

LOG

private static final org.slf4j.Logger LOG

GSON

private static final org.apache.hbase.thirdparty.com.google.gson.Gson GSON

Constructor Details

JSONBean

public JSONBean()

Method Details

open

public JSONBean.Writer open(PrintWriter writer)
                     throws IOException

Notice that, closing the return JSONBean.Writer will not close the writer passed in, you still need to close the writer by yourself.

This is because that, we can only finish the json after you call Closeable.close(). So if we just close the writer, you can write nothing after finished the json.

Throws:

IOException

write

private static int write(org.apache.hbase.thirdparty.com.google.gson.stream.JsonWriter writer,
 MBeanServer mBeanServer,
 ObjectName qry,
 String attribute,
 boolean description,
 ObjectName excluded)
                  throws IOException

Returns Return non-zero if failed to find bean. 0

Throws:

IOException

writeAttribute

private static void writeAttribute(org.apache.hbase.thirdparty.com.google.gson.stream.JsonWriter writer,
 MBeanServer mBeanServer,
 ObjectName oname,
 boolean description,
 Pattern[] pattern,
 MBeanAttributeInfo attr)
                            throws IOException

Throws:

IOException

writeAttribute

private static void writeAttribute(org.apache.hbase.thirdparty.com.google.gson.stream.JsonWriter writer,
 String attName,
 String descriptionStr,
 Object value)
                            throws IOException

Throws:

IOException

writeObject

private static void writeObject(org.apache.hbase.thirdparty.com.google.gson.stream.JsonWriter writer,
 Object value)
                         throws IOException

Throws:

IOException

dumpAllBeans

public static void dumpAllBeans()
                         throws IOException,
MalformedObjectNameException

Dump out all registered mbeans as json on System.out.

Throws:

IOException

MalformedObjectNameException