org.osgi.service.application.ScheduledApplication Maven / Gradle / Ivy
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/*
* Copyright (c) OSGi Alliance (2004, 2010). All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.osgi.service.application;
import java.util.Map;
/**
* It is allowed to schedule an application based on a specific event.
* ScheduledApplication service keeps the schedule information. When the
* specified event is fired a new instance must be launched. Note that launching
* operation may fail because e.g. the application is locked.
*
* Each {@code ScheduledApplication} instance has an identifier which is
* unique within the scope of the application being scheduled.
*
* {@code ScheduledApplication} instances are registered as services. The
* {@link #APPLICATION_PID} service property contains the PID of the application
* being scheduled, the {@link #SCHEDULE_ID} service property contains the
* schedule identifier.
*
* @version $Id: 4e7a9605b5cd0d452210963f26ef19e42b329e14 $
*/
public interface ScheduledApplication {
/**
* The property key for the identifier of the application being scheduled.
*/
public static final String APPLICATION_PID = ApplicationDescriptor.APPLICATION_PID;
/**
* The property key for the schedule identifier. The identifier is unique
* within the scope of the application being scheduled.
*/
public static final String SCHEDULE_ID = "schedule.id";
/**
* The key for the startup argument used to pass the event object that
* triggered the schedule to launch the application instance.
* The event is passed in a {@link java.security.GuardedObject}
* protected by the corresponding
* {@link org.osgi.service.event.TopicPermission}.
*/
public static final String TRIGGERING_EVENT = "org.osgi.triggeringevent";
/**
* The topic name for the virtual timer topic. Time based schedules
* should be created using this topic.
*/
public static final String TIMER_TOPIC = "org/osgi/application/timer";
/**
* The name of the year attribute of a virtual timer event. The value is
* defined by {@link java.util.Calendar#YEAR}.
*/
public static final String YEAR = "year";
/**
* The name of the month attribute of a virtual timer event. The value is
* defined by {@link java.util.Calendar#MONTH}.
*/
public static final String MONTH = "month";
/**
* The name of the day of month attribute of a virtual timer event. The value is
* defined by {@link java.util.Calendar#DAY_OF_MONTH}.
*/
public static final String DAY_OF_MONTH = "day_of_month";
/**
* The name of the day of week attribute of a virtual timer event. The value is
* defined by {@link java.util.Calendar#DAY_OF_WEEK}.
*/
public static final String DAY_OF_WEEK = "day_of_week";
/**
* The name of the hour of day attribute of a virtual timer event. The value is
* defined by {@link java.util.Calendar#HOUR_OF_DAY}.
*/
public static final String HOUR_OF_DAY = "hour_of_day";
/**
* The name of the minute attribute of a virtual timer event. The value is
* defined by {@link java.util.Calendar#MINUTE}.
*/
public static final String MINUTE = "minute";
/**
* Returns the identifier of this schedule. The identifier is unique within
* the scope of the application that the schedule is related to.
* @return the identifier of this schedule
*
*/
public String getScheduleId();
/**
* Queries the topic of the triggering event. The topic may contain a
* trailing asterisk as wildcard.
*
* @return the topic of the triggering event
*
* @throws IllegalStateException
* if the scheduled application service is unregistered
*/
public String getTopic();
/**
* Queries the event filter for the triggering event.
*
* @return the event filter for triggering event
*
* @throws IllegalStateException
* if the scheduled application service is unregistered
*/
public String getEventFilter();
/**
* Queries if the schedule is recurring.
*
* @return true if the schedule is recurring, otherwise returns false
*
* @throws IllegalStateException
* if the scheduled application service is unregistered
*/
public boolean isRecurring();
/**
* Retrieves the ApplicationDescriptor which represents the application and
* necessary for launching.
*
* @return the application descriptor that
* represents the scheduled application
*
* @throws IllegalStateException
* if the scheduled application service is unregistered
*/
public ApplicationDescriptor getApplicationDescriptor();
/**
* Queries the startup arguments specified when the application was
* scheduled. The method returns a copy of the arguments, it is not possible
* to modify the arguments after scheduling.
*
* @return the startup arguments of the scheduled application. It may be
* null if null argument was specified.
*
* @throws IllegalStateException
* if the scheduled application service is unregistered
*/
public Map getArguments();
/**
* Cancels this schedule of the application.
*
* @throws SecurityException
* if the caller doesn't have "schedule"
* ApplicationAdminPermission for the scheduled application.
* @throws IllegalStateException
* if the scheduled application service is unregistered
*/
public void remove();
}