See:
Description
Interface Summary | |
---|---|
JMXAddressable | Implemented by objects that can have a JMXServiceURL address. |
JMXAuthenticator | Interface to define how remote credentials are converted into a JAAS Subject. |
JMXConnector | The client end of a JMX API connector. |
JMXConnectorProvider | A provider for creating JMX API connector clients using a given protocol. |
JMXConnectorServerMBean | MBean interface for connector servers. |
JMXConnectorServerProvider | A provider for creating JMX API connector servers using a given protocol. |
MBeanServerForwarder | An object of this class implements the MBeanServer interface and wraps another object that also implements that interface. |
Class Summary | |
---|---|
JMXConnectionNotification | Notification emitted when a client connection is opened or closed or when notifications are lost. |
JMXConnectorFactory | Factory to create JMX API connector clients. |
JMXConnectorServer | Superclass of every connector server. |
JMXConnectorServerFactory | Factory to create JMX API connector servers. |
JMXPrincipal | The identity of a remote client of the JMX Remote API. |
JMXServiceURL | The address of a JMX API connector server. |
NotificationResult | Result of a query for buffered notifications. |
SubjectDelegationPermission | Permission required by an authentication identity to perform operations on behalf of an authorization identity. |
TargetedNotification | A (Notification, Listener ID) pair. |
Exception Summary | |
---|---|
JMXProviderException | Exception thrown by JMXConnectorFactory and JMXConnectorServerFactory when a provider exists for the required protocol but cannot be used for some reason. |
JMXServerErrorException | Exception thrown as the result of a remote MBeanServer method invocation when an Error is thrown while processing the invocation in the remote MBean server. |
Interfaces for remote access to JMX MBean servers. This package defines the essential interfaces for making a JMX MBean server manageable remotely.
The specification of this functionality is completed by Part III of the
JMX Specification, version 1.4
PDF document.
The companion document JMX Remote API completes the specification of this interface. It should be available as a PDF document in the same place as this Javadoc specification.
The JMX specification defines the notion of connectors . A connector is attached to a JMX API MBean server and makes it accessible to remote Java clients. The client end of a connector exports essentially the same interface as the MBean server, specifically the MBeanServerConnection interface.
A connector makes an MBean server remotely accessible through a given protocol.
The JMX Remote API allows the use of different type of connectors:
Note
: the optional packages implementing the optional part of the JMX Remote API are not included in the Java SE Platform but are available from the JMX Remote API
Reference Implementation
The JMX Remote API defines a standard connector, the
RMI Connector
, which provides remote access to an MBeanServer through RMI.
The JMX Remote API also defines an optional protocol called
JMXMP
(JMX Message Protocol). JMXMP is based on serialized Java objects (defined in the optional package javax.management.remote.message) over a TCP connection. The connector that implements this protocol is called the
JMXMP Connector
. User-defined connector protocols are also possible using the
JMXConnectorFactory
.
and, optionally, the Generic Connector (javax.management.remote.generic).
Typically, a connector
server
has an address, represented by the class
JMXServiceURL
. An address for the
RMI
JMXMP
Connector
can look
looks
like this:
service:jmx:rmi:///jndi/rmi://myhost:1099/myname
service:jmx:jmxmp://myhost:9876
In this JMXServiceURL, the first rmi: specifies the RMI connector, while the second rmi: specifies the RMI registry into which the RMI connector server has stored its stub.
The example above shows only one form of address. An address for the RMI Connector can take several forms, as detailed in the documentation for the package
javax.management.remote.rmi
.
An address for the RMI Connector can take several forms, as detailed in the documentation for the package javax.management.remote.rmi.
A connector server is created by constructing an instance of a subclass of JMXConnectorServer . Usually, this instance is created using the method JMXConnectorServerFactory.newJMXConnectorServer .
Typically, a connector server is associated with an MBean server either by registering it in that MBean server, or by supplying the MBean server as a parameter when creating the connector server.
A connector client is usually created by supplying
the
a
JMXServiceURL
of the connector server
to
connect to to
the
JMXConnectorFactory.connect
method.
For more specialized uses, a connector client can be created by directly instantiating a class that implements the JMXConnector interface, for example the class RMIConnector .
When creating a connector client or server, it is possible to supply an object of type Map that defines additional parameters. Each entry in this Map has a key that is a string and an associated value whose type is appropriate for that key. The standard keys defined by the JMX Remote API all begin with the string "jmx.remote.". The document JMX Remote API lists these standard keys.
Every connection opened by a connector server has a string identifier, called its
connection id
. This identifier appears in the
JMXConnectionNotification
events emitted by the connector server, in the list returned by
getConnectionIds()
JMXConnectorServerMBean#getConnectionIds()
, and in the value returned by the client's
getConnectionId()
method.
As an example,
Conventionally,
a connection ID
can look
looks
something like this:
rmi://192.18.1.9 username 1
jmxmp://clienthost:6789 clientname xxxyyyzzz
The formal grammar for connection ids that follow this convention is as follows (using the grammar notation from The Java Language Specification, Second Edition):
ConnectionId: Protocol : ClientAddressopt Space ClientIdopt Space ArbitraryText ClientAddress: // HostAddress ClientPortopt ClientPort : HostPort
The Protocol is a protocol that would be recognized by JMXConnectorFactory .
The ClientAddress is the address and port of the connecting client, if these can be determined, otherwise nothing. The HostAddress is the Internet address of the host that the client is connecting from, in numeric or DNS form. Numeric IPv6 addresses are enclosed in square brackets []. The HostPort is the decimal port number that the client is connecting from.
The ClientId is the identity of the client entity, typically a string returned by JMXPrincipal.getName() . This string must not contain spaces.
The ArbitraryText is any additional text that the connector server adds when creating the client id. At a minimum, it must be enough to distinguish this connection ID from the ID of any other connection currently opened by this connector server.