org.apache.derby.impl.services.monitor
Class FileMonitor

java.lang.Object
  org.apache.derby.impl.services.monitor.BaseMonitor
      org.apache.derby.impl.services.monitor.FileMonitor

All Implemented Interfaces:

BundleFinder, ModuleFactory, java.security.PrivilegedExceptionAction

public final class FileMonitor

extends BaseMonitor

implements java.security.PrivilegedExceptionAction

Implementation of the monitor that uses the class loader that the its was loaded in for all class loading.

Nested Class Summary

Nested classes inherited from class org.apache.derby.impl.services.monitor.BaseMonitor

BaseMonitor.ProviderEnumeration

Field Summary

private int	action
private ProductVersionHolder	engineVersion
private java.io.File	home
private int	intValue
private java.lang.String	key3
private java.net.URL	propertyFileURL
private java.lang.Runnable	task

Fields inherited from class org.apache.derby.impl.services.monitor.BaseMonitor

applicationProperties, bootProperties, daemonGroup, dontGC, implementationSets, inShutdown, reportOn, serviceProviders

Constructor Summary

FileMonitor()

FileMonitor(java.util.Properties properties, java.io.PrintStream log)

Method Summary

protected java.io.InputStream	applicationPropertiesStream() Get InputStream for application properties file Returns nul if it does not exist.
java.lang.Thread	getDaemonThread(java.lang.Runnable task, java.lang.String name, boolean setMinPriority) Get a newly created background thread.
ProductVersionHolder	getEngineVersion()
java.lang.Object	getEnvironment() Return the environment object that this system was booted in.
java.lang.String	getJVMProperty(java.lang.String key) Return a property from the JVM's system set.
boolean	initialize(boolean lite) Initialize the system in a privileged block.
protected java.io.InputStream	loadModuleDefinitions(java.net.URL propertyFileURL)
private java.io.InputStream	PBapplicationPropertiesStream()
private java.lang.String	PBgetJVMProperty(java.lang.String key) SECURITY WARNING.
private boolean	PBinitialize(boolean lite) SECURITY WARNING.
java.lang.Object	run()
void	setThreadPriority(int priority) Set the priority of the current thread.

Methods inherited from class org.apache.derby.impl.services.monitor.BaseMonitor

boot, bootPersistentServices, bootProviderServices, bootService, bootServiceProviders, canSupport, classFromIdentifier, createPersistentService, dumpProperties, findModule, findProvider, findProviderAndStartService, findProviderForCreate, findService, getApplicationProperties, getBundle, getDefaultImplementations, getImplementations, getLocale, getLocaleFromString, getServiceList, getServiceName, getServiceProvider, getServiceType, getSystemStreams, getUUIDFactory, loadInstance, newInstanceFromIdentifier, readApplicationProperties, removePersistentService, removeRuntimeProperties, report, reportException, runWithState, setLocale, setLocale, shutdown, shutdown, startModule, startNonPersistentService, startPersistentService, startPersistentService, startProviderService, startServices

Methods inherited from class java.lang.Object

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

Field Detail

home

private java.io.File home

engineVersion

private ProductVersionHolder engineVersion

action

private int action

key3

private java.lang.String key3

task

private java.lang.Runnable task

intValue

private int intValue

propertyFileURL

private java.net.URL propertyFileURL

Constructor Detail

FileMonitor

public FileMonitor()

FileMonitor

public FileMonitor(java.util.Properties properties,
                   java.io.PrintStream log)

Method Detail

PBapplicationPropertiesStream

private java.io.InputStream PBapplicationPropertiesStream()
                                                   throws java.io.IOException

Throws:

java.io.IOException

getEnvironment

public java.lang.Object getEnvironment()

Description copied from interface: ModuleFactory

Return the environment object that this system was booted in. This is a free form object that is set by the method the system is booted. For example when running in a Marimba system it is set to the maribma application context. In most environments it will be set to a java.io.File object representing the system home directory. Code that call this method usualy have predefined knowledge of the type of the returned object, e.g. Marimba store code knows that this will be set to a marimba application context.

Specified by:

getEnvironment in interface ModuleFactory

PBinitialize

private boolean PBinitialize(boolean lite)

SECURITY WARNING. This method is run in a privledged block in a Java 2 environment. Set the system home directory. Returns false if it couldn't for some reason.

PBgetJVMProperty

private java.lang.String PBgetJVMProperty(java.lang.String key)

SECURITY WARNING. This method is run in a privledged block in a Java 2 environment. Return a property from the JVM's system set. In a Java2 environment this will be executed as a privliged block if and only if the property starts with db2j. If a SecurityException occurs, null is returned.

initialize

public final boolean initialize(boolean lite)

Initialize the system in a privileged block.

Specified by:

initialize in class BaseMonitor

loadModuleDefinitions

protected final java.io.InputStream loadModuleDefinitions(java.net.URL propertyFileURL)
                                                   throws java.io.IOException

Overrides:

loadModuleDefinitions in class BaseMonitor

Throws:

java.io.IOException

getJVMProperty

public final java.lang.String getJVMProperty(java.lang.String key)

Description copied from interface: ModuleFactory

Return a property from the JVM's system set. In a Java2 environment this will be executed as a privliged block if and only if the property starts with db2j. If a SecurityException occurs, null is returned.

Specified by:

getJVMProperty in interface ModuleFactory

getDaemonThread

public final java.lang.Thread getDaemonThread(java.lang.Runnable task,
                                              java.lang.String name,
                                              boolean setMinPriority)

Description copied from interface: ModuleFactory

Get a newly created background thread. The thread is set to be a daemon but is not started.

Specified by:

getDaemonThread in interface ModuleFactory

Overrides:

getDaemonThread in class BaseMonitor

setThreadPriority

public final void setThreadPriority(int priority)

Description copied from interface: ModuleFactory

Set the priority of the current thread. If the current thread was not returned by getDaemonThread() then no action is taken.

Specified by:

setThreadPriority in interface ModuleFactory

Overrides:

setThreadPriority in class BaseMonitor

applicationPropertiesStream

protected final java.io.InputStream applicationPropertiesStream()
                                                         throws java.io.IOException

Description copied from class: BaseMonitor

Get InputStream for application properties file Returns nul if it does not exist.

Specified by:

applicationPropertiesStream in class BaseMonitor

Throws:

java.io.IOException

run

public final java.lang.Object run()
                           throws java.io.IOException

Specified by:

run in interface java.security.PrivilegedExceptionAction

Throws:

java.io.IOException

getEngineVersion

public final ProductVersionHolder getEngineVersion()

Specified by:

getEngineVersion in interface ModuleFactory