JSONBean (Apache HBase 1.2.12 API)

java.lang.Object
- org.apache.hadoop.hbase.util.JSONBean

```
public class JSONBean
extends Object
```
Utility for doing JSON and MBeans.

Nested Class Summary

Nested Classes
Modifier and Type Class and Description

static interface JSONBean.Writer
Use dumping out mbeans as JSON.

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

Field Summary

Fields
Modifier and Type Field and Description

private org.codehaus.jackson.JsonFactory jsonFactory

private static org.apache.commons.logging.Log LOG

Fields
Modifier and Type	Field and Description
`private org.codehaus.jackson.JsonFactory`	`jsonFactory`
`private static org.apache.commons.logging.Log`	`LOG`

Constructor Summary

Constructors
Constructor and Description

JSONBean()

Constructors
Constructor and Description
`JSONBean()`

Method Summary

Methods
Modifier and Type	Method and Description
`static void`	`dumpAllBeans()` Dump out all registered mbeans as json on System.out.
`static String`	`dumpRegionServerMetrics()` Dump out a subset of regionserver mbeans only, not all of them, as json on System.out.
`static void`	`main(String[] args)`
`JSONBean.Writer`	`open(PrintWriter writer)`
`private static int`	`write(org.codehaus.jackson.JsonGenerator jg, MBeanServer mBeanServer, ObjectName qry, String attribute, boolean description)`
`private static void`	`writeAttribute(org.codehaus.jackson.JsonGenerator jg, MBeanServer mBeanServer, ObjectName oname, boolean description, MBeanAttributeInfo attr)`
`private static void`	`writeAttribute(org.codehaus.jackson.JsonGenerator jg, String attName, String descriptionStr, Object value)`
`private static void`	`writeObject(org.codehaus.jackson.JsonGenerator jg, boolean description, Object value)`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

LOG

private static final org.apache.commons.logging.Log LOG

jsonFactory

private final org.codehaus.jackson.JsonFactory jsonFactory

Constructor Detail
- JSONBean
```
public JSONBean()
```

Method Detail

open

public JSONBean.Writer open(PrintWriter writer)
                     throws IOException

Throws:: IOException

write

private static int write(org.codehaus.jackson.JsonGenerator jg,
        MBeanServer mBeanServer,
        ObjectName qry,
        String attribute,
        boolean description)
                  throws IOException

Parameters:: mBeanServer -; qry -; attribute -; description -
Returns:: Return non-zero if failed to find bean. 0
Throws:: IOException

writeAttribute

private static void writeAttribute(org.codehaus.jackson.JsonGenerator jg,
                  MBeanServer mBeanServer,
                  ObjectName oname,
                  boolean description,
                  MBeanAttributeInfo attr)
                            throws IOException

Throws:: IOException

writeAttribute

private static void writeAttribute(org.codehaus.jackson.JsonGenerator jg,
                  String attName,
                  String descriptionStr,
                  Object value)
                            throws IOException

Throws:: IOException

writeObject

private static void writeObject(org.codehaus.jackson.JsonGenerator jg,
               boolean description,
               Object value)
                         throws IOException

Throws:: IOException

dumpRegionServerMetrics

public static String dumpRegionServerMetrics()
                                      throws MalformedObjectNameException,
                                             IOException

Dump out a subset of regionserver mbeans only, not all of them, as json on System.out.

Throws:: MalformedObjectNameException; IOException

dumpAllBeans

public static void dumpAllBeans()
                         throws IOException,
                                MalformedObjectNameException

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

Throws:: IOException; MalformedObjectNameException

main

public static void main(String[] args)
                 throws IOException,
                        MalformedObjectNameException

Throws:: IOException; MalformedObjectNameException

Class JSONBean

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

LOG

jsonFactory

Constructor Detail

JSONBean

Method Detail

open

write

writeAttribute

writeAttribute

writeObject

dumpRegionServerMetrics

dumpAllBeans

main