JMXServiceURL (Java SE 15 & JDK 15) (original) (raw)

All Implemented Interfaces:

[Serializable](../../../../java.base/java/io/Serializable.html "interface in java.io")

public class JMXServiceURL extends Object implements Serializable

The address of a JMX API connector server. Instances of this class are immutable.

The address is an Abstract Service URL for SLP, as defined in RFC 2609 and amended by RFC 3111. It must look like this:

service:jmx:_protocol_:_sap_

Here, _protocol_ is the transport protocol to be used to connect to the connector server. It is a string of one or more ASCII characters, each of which is a letter, a digit, or one of the characters + or-. The first character must be a letter. Uppercase letters are converted into lowercase ones.

_sap_ is the address at which the connector server is found. This address uses a subset of the syntax defined by RFC 2609 for IP-based protocols. It is a subset because theuser@host syntax is not supported.

The other syntaxes defined by RFC 2609 are not currently supported by this class.

The supported syntax is:

//_[host[_:_port]][url-path]_

Square brackets [] indicate optional parts of the address. Not all protocols will recognize all optional parts.

The _host_ is a host name, an IPv4 numeric host address, or an IPv6 numeric address enclosed in square brackets.

The _port_ is a decimal port number. 0 means a default or anonymous port, depending on the protocol.

The _host_ and _port_ can be omitted. The _port_ cannot be supplied without a _host_.

The _url-path_, if any, begins with a slash (/) or a semicolon (;) and continues to the end of the address. It can contain attributes using the semicolon syntax specified in RFC 2609. Those attributes are not parsed by this class and incorrect attribute syntax is not detected.

Although it is legal according to RFC 2609 to have a_url-path_ that begins with a semicolon, not all implementations of SLP allow it, so it is recommended to avoid that syntax.

Case is not significant in the initialservice:jmx:_protocol_ string or in the host part of the address. Depending on the protocol, case can be significant in the _url-path_.

Since:

1.5

See Also:

RFC 2609, "Service Templates and Service: Schemes", RFC 3111, "Service Location Protocol Modifications for IPv6", Serialized Form

• Constructor Summary

Constructors

• Method Summary

• Constructor Details

  • JMXServiceURL

  Constructs a JMXServiceURL by parsing a Service URL string.
  Parameters:
  serviceURL - the URL string to be parsed.
  Throws:
  [NullPointerException](../../../../java.base/java/lang/NullPointerException.html "class in java.lang") - if serviceURL is null.
  [MalformedURLException](../../../../java.base/java/net/MalformedURLException.html "class in java.net") - if serviceURL does not conform to the syntax for an Abstract Service URL or if it is not a valid name for a JMX Remote API service. AJMXServiceURL must begin with the string"service:jmx:" (case-insensitive). It must not contain any characters that are not printable ASCII characters.

  • JMXServiceURL

  Constructs a JMXServiceURL with the given protocol, host, and port. This constructor is equivalent toJMXServiceURL(protocol, host, port, null).
  Parameters:
  protocol - the protocol part of the URL. If null, defaults to jmxmp.
  host - the host part of the URL. If host is null and if local host name can be resolved to an IP, then host defaults to local host name as determined byInetAddress.getLocalHost().getHostName(). If host is null and if local host name cannot be resolved to an IP, then host defaults to numeric IP address of one of the active network interfaces. If host is a numeric IPv6 address, it can optionally be enclosed in square brackets [].
  port - the port part of the URL.
  Throws:
  [MalformedURLException](../../../../java.base/java/net/MalformedURLException.html "class in java.net") - if one of the parts is syntactically incorrect, or if host is null and it is not possible to find the local host name, or ifport is negative.

  • JMXServiceURL

  Constructs a JMXServiceURL with the given parts.
  Parameters:
  protocol - the protocol part of the URL. If null, defaults to jmxmp.
  host - the host part of the URL. If host is null and if local host name can be resolved to an IP, then host defaults to local host name as determined byInetAddress.getLocalHost().getHostName(). If host is null and if local host name cannot be resolved to an IP, then host defaults to numeric IP address of one of the active network interfaces. If host is a numeric IPv6 address, it can optionally be enclosed in square brackets [].
  port - the port part of the URL.
  urlPath - the URL path part of the URL. If null, defaults to the empty string.
  Throws:
  [MalformedURLException](../../../../java.base/java/net/MalformedURLException.html "class in java.net") - if one of the parts is syntactically incorrect, or if host is null and it is not possible to find the local host name, or ifport is negative.

• Method Details

  • getProtocol

  public String getProtocol()
  The protocol part of the Service URL.
  Returns:
  the protocol part of the Service URL. This is never null.

  • getHost

  The host part of the Service URL. If the Service URL was constructed with the constructor that takes a URL string parameter, the result is the substring specifying the host in that URL. If the Service URL was constructed with a constructor that takes a separate host parameter, the result is the string that was specified. If that string was null, the result isInetAddress.getLocalHost().getHostName() if local host name can be resolved to an IP. Else numeric IP address of an active network interface will be used.
  In either case, if the host was specified using the[...] syntax for numeric IPv6 addresses, the square brackets are not included in the return value here.
  Returns:
  the host part of the Service URL. This is never null.

  • getPort

  public int getPort()
  The port of the Service URL. If no port was specified, the returned value is 0.
  Returns:
  the port of the Service URL, or 0 if none.

  • getURLPath

  public String getURLPath()
  The URL Path part of the Service URL. This is an empty string, or a string beginning with a slash (/), or a string beginning with a semicolon (;).
  Returns:
  the URL Path part of the Service URL. This is never null.

  • toString

  The string representation of this Service URL. If the value returned by this method is supplied to theJMXServiceURL constructor, the resultant object is equal to this one.
  The _host_ part of the returned string is the value returned by getHost(). If that value specifies a numeric IPv6 address, it is surrounded by square brackets [].
  The _port_ part of the returned string is the value returned by getPort() in its shortest decimal form. If the value is zero, it is omitted.
  Overrides:
  [toString](../../../../java.base/java/lang/Object.html#toString%28%29) in class [Object](../../../../java.base/java/lang/Object.html "class in java.lang")
  Returns:
  the string representation of this Service URL.

  • equals

  public boolean equals​(Object obj)
  Indicates whether some other object is equal to this one. This method returns true if and only if obj is an instance of JMXServiceURL whose getProtocol(), getHost(), getPort(), andgetURLPath() methods return the same values as for this object. The values for getProtocol() and getHost() can differ in case without affecting equality.
  Overrides:
  [equals](../../../../java.base/java/lang/Object.html#equals%28java.lang.Object%29) in class [Object](../../../../java.base/java/lang/Object.html "class in java.lang")
  Parameters:
  obj - the reference object with which to compare.
  Returns:
  true if this object is the same as theobj argument; false otherwise.
  See Also:
  Object.hashCode(), HashMap