Class Configuration

public final class Configuration
extends Object

A collection of settings and metadata describing the configuration.

Since:
9

Methods

Modifier and Type Method Description
static Configuration create​(Reader reader)

Reads a configuration from a character stream.
static Configuration create​(Path path)

Reads a configuration from a file.
static Configuration getConfiguration​(String name)

Returns a predefined configuration.
static List<Configuration> getConfigurations()

Returns an immutable list of predefined configurations for this Java Virtual Machine (JVM).
String getContents()

Returns a textual representation of the configuration (for example, the contents of a JFC file).
String getDescription()

Returns a short sentence that describes the configuration (for example "Low overhead configuration safe for continuous use in production environments")
String getLabel()

Returns a human-readable name (for example, "Continuous" or "Profiling"}.
String getName()

Returns an identifying name (for example, "default" or "profile").
String getProvider()

Returns who created the configuration (for example "OpenJDK").
Map<String,​String> getSettings()

Returns the settings that specifies how a recording is configured.

Methods declared in class java.lang.Object

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

Methods

getSettings

public Map<String,String> getSettings()

Returns the settings that specifies how a recording is configured.

Modifying the returned Map object doesn't change the configuration.

Returns:
settings, not null

getName

public String getName()

Returns an identifying name (for example, "default" or "profile").

Returns:
the name, or null if it doesn't exist

getLabel

public String getLabel()

Returns a human-readable name (for example, "Continuous" or "Profiling"}.

Returns:
the label, or null if it doesn't exist

getDescription

public String getDescription()

Returns a short sentence that describes the configuration (for example "Low overhead configuration safe for continuous use in production environments")

Returns:
the description, or null if it doesn't exist

getProvider

public String getProvider()

Returns who created the configuration (for example "OpenJDK").

Returns:
the provider, or null if it doesn't exist

getContents

public String getContents()

Returns a textual representation of the configuration (for example, the contents of a JFC file).

Returns:
contents, or null if it doesn't exist
See Also:
getContents()

create

public static Configuration create(Path path)
                            throws IOException,
                                   ParseException

Reads a configuration from a file.

Parameters:
path - the file that contains the configuration, not null
Returns:
the read Configuration, not null
Throws:
ParseException - if the file can't be parsed
IOException - if the file can't be read
SecurityException - if a security manager exists and its checkRead method denies read access to the file.
See Also:
File.getPath(), SecurityManager.checkRead(java.lang.String)

create

public static Configuration create(Reader reader)
                            throws IOException,
                                   ParseException

Reads a configuration from a character stream.

Parameters:
reader - a Reader that provides the configuration contents, not null
Returns:
a configuration, not null
Throws:
IOException - if an I/O error occurs while trying to read contents from the Reader
ParseException - if the file can't be parsed

getConfiguration

public static Configuration getConfiguration(String name)
                                      throws IOException,
                                             ParseException

Returns a predefined configuration.

See getConfigurations() for available configuration names.

Parameters:
name - the name of the configuration (for example, "default" or "profile")
Returns:
a configuration, not null
Throws:
IOException - if a configuration with the given name does not exist, or if an I/O error occurs while reading the configuration file
ParseException - if the configuration file can't be parsed

getConfigurations

public static List<Configuration> getConfigurations()

Returns an immutable list of predefined configurations for this Java Virtual Machine (JVM).

Returns:
the list of predefined configurations, not null

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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
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https://docs.oracle.com/en/java/javase/11/docs/api/jdk.jfr/jdk/jfr/Configuration.html