Package org.apache.derby.impl.services.monitor

Class FileMonitor

  • All Implemented Interfaces:
    BundleFinder, ModuleFactory
    public final class FileMonitor
extends BaseMonitor
    Implementation of the monitor that uses the class loader that the its was loaded in for all class loading.

    • Field Detail

      • home

        private java.io.File home

      • securityProperties

        private static final java.util.Map<java.lang.String,​java.lang.Void> securityProperties

    • Constructor Detail

      • FileMonitor

        public FileMonitor()

      • FileMonitor

        public FileMonitor​(java.util.Properties properties,
                   java.io.PrintWriter 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.

      • createDaemonGroup

        private java.lang.ThreadGroup createDaemonGroup()
        Create a ThreadGroup and set the daemon property to make sure the group is destroyed and garbage collected when all its members have finished (i.e., either when the driver is unloaded, or when the last database is shut down).
        Returns:
        the thread group "derby.daemons" or null if we saw a SecurityException

      • PBinitialize

        private boolean PBinitialize​(boolean lite)
        SECURITY WARNING. This method is run in a privileged 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 privileged 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 privileged block if and only if the property starts with 'derby.'. If a SecurityException occurs, null is returned.

      • report

        private void report​(java.lang.SecurityException e,
                    java.lang.String key)

      • report

        private void report​(java.lang.SecurityException e,
                    java.io.File file)

      • reportThread

        private void reportThread​(java.lang.SecurityException e)

      • initialize

        final boolean initialize​(boolean lite)
        Initialize the system in a privileged block.
        Specified by:
        initialize in class BaseMonitor

      • getDefaultModuleProperties

        final java.util.Properties getDefaultModuleProperties()
        Description copied from class: BaseMonitor
        Get the complete set of module properties by loading in contents of all the org/apache/derby/modules.properties files. This must be executed in a privileged block otherwise when running in a security manager environment no properties will be returned.
        Overrides:
        getDefaultModuleProperties in class BaseMonitor

      • 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 privileged block if and only if the property starts with 'derby.'. If a SecurityException occurs, null is returned.

      • 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

      • applicationPropertiesStream

        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