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start implementation of a new event api based on guavas EventBus

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This commit is contained in:
Sebastian Sdorra
2012-12-07 17:41:43 +01:00
parent ef20090821
commit aee7ba1279
8 changed files with 602 additions and 0 deletions
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70
scm-core/src/main/java/com/google/common/eventbus/ThrowingEventBus.java Normal file
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/**
* Copyright (c) 2010, Sebastian Sdorra All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer. 2. Redistributions in
* binary form must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution. 3. Neither the name of SCM-Manager;
* nor the names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* http://bitbucket.org/sdorra/scm-manager
*
*/
package com.google.common.eventbus;
//~--- non-JDK imports --------------------------------------------------------
import sonia.scm.event.EventBusException;
//~--- JDK imports ------------------------------------------------------------
import java.lang.reflect.InvocationTargetException;
/**
*
* @author Sebastian Sdorra
* @since 1.23
*/
public class ThrowingEventBus extends EventBus
{
/**
* Method description
*
*
* @param event
* @param wrapper
*/
@Override
void dispatch(Object event, EventHandler wrapper)
{
try
{
wrapper.handleEvent(event);
}
catch (InvocationTargetException ex)
{
throw new EventBusException(
"could not handle event ".concat(event.toString()), ex);
}
}
}

86
scm-core/src/main/java/sonia/scm/event/EventBusException.java Normal file
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/**
* Copyright (c) 2010, Sebastian Sdorra All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer. 2. Redistributions in
* binary form must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution. 3. Neither the name of SCM-Manager;
* nor the names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* http://bitbucket.org/sdorra/scm-manager
*
*/
package sonia.scm.event;
/**
*
* @author Sebastian Sdorra
* @since 1.23
*/
public class EventBusException extends RuntimeException
{
/** Field description */
private static final long serialVersionUID = -6090833234971972368L;
//~--- constructors ---------------------------------------------------------
/**
* Constructs ...
*
*/
public EventBusException() {}
/**
* Constructs ...
*
*
* @param message
*/
public EventBusException(String message)
{
super(message);
}
/**
* Constructs ...
*
*
* @param cause
*/
public EventBusException(Throwable cause)
{
super(cause);
}
/**
* Constructs ...
*
*
* @param message
* @param cause
*/
public EventBusException(String message, Throwable cause)
{
super(message, cause);
}
}

65
scm-core/src/main/java/sonia/scm/event/HandlerEventBase.java Normal file
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/**
* Copyright (c) 2010, Sebastian Sdorra All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer. 2. Redistributions in
* binary form must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution. 3. Neither the name of SCM-Manager;
* nor the names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* http://bitbucket.org/sdorra/scm-manager
*
*/
package sonia.scm.event;
//~--- non-JDK imports --------------------------------------------------------
import sonia.scm.HandlerEvent;
/**
*
* TODO for 2.0 rename to HandlerEvent
*
* @author Sebastian Sdorra
* @since 1.23
*
* @param <T>
*/
public interface HandlerEventBase<T>
{
/**
* Method description
*
*
* @return
*/
public HandlerEvent getEventType();
/**
* Method description
*
*
* @return
*/
public T getItem();
}

149
scm-core/src/main/java/sonia/scm/event/ScmEventBus.java Normal file
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/**
* Copyright (c) 2010, Sebastian Sdorra All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer. 2. Redistributions in
* binary form must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution. 3. Neither the name of SCM-Manager;
* nor the names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* http://bitbucket.org/sdorra/scm-manager
*
*/
package sonia.scm.event;
//~--- non-JDK imports --------------------------------------------------------
import com.google.common.eventbus.AsyncEventBus;
import com.google.common.eventbus.EventBus;
import com.google.common.eventbus.ThrowingEventBus;
import org.apache.shiro.concurrent.SubjectAwareExecutorService;
//~--- JDK imports ------------------------------------------------------------
import java.util.concurrent.Executors;
/**
*
* @author Sebastian Sdorra
* @since 1.23
*/
public class ScmEventBus extends EventBus
{
/** Field description */
private static ScmEventBus instance = new ScmEventBus();
//~--- constructors ---------------------------------------------------------
/**
* Constructs ...
*
*/
private ScmEventBus()
{
eventBus = new ThrowingEventBus();
asyncEventBus = new AsyncEventBus(
new SubjectAwareExecutorService(Executors.newCachedThreadPool()));
}
//~--- get methods ----------------------------------------------------------
/**
* Method description
*
*
* @return
*/
public static ScmEventBus getInstance()
{
return instance;
}
//~--- methods --------------------------------------------------------------
/**
* Method description
*
*
* @param event
*/
@Override
public void post(Object event)
{
asyncEventBus.post(event);
eventBus.post(event);
}
/**
* Method description
*
*
* @param object
*/
@Override
public void register(Object object)
{
register(object, true);
}
/**
* Method description
*
*
* @param object
* @param async
*/
public void register(Object object, boolean async)
{
if (async)
{
asyncEventBus.register(object);
}
else
{
eventBus.register(object);
}
}
/**
* Method description
*
*
* @param object
*/
@Override
public void unregister(Object object)
{
asyncEventBus.unregister(object);
eventBus.unregister(object);
}
//~--- fields ---------------------------------------------------------------
/** Field description */
private AsyncEventBus asyncEventBus;
/** Field description */
private EventBus eventBus;
}

53
scm-core/src/main/java/sonia/scm/event/Subscriber.java Normal file
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/**
* Copyright (c) 2010, Sebastian Sdorra All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer. 2. Redistributions in
* binary form must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution. 3. Neither the name of SCM-Manager;
* nor the names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* http://bitbucket.org/sdorra/scm-manager
*
*/
package sonia.scm.event;
//~--- JDK imports ------------------------------------------------------------
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
*
* @author Sebastian Sdorra
* @since 1.23
*/
@Documented
@Target({ ElementType.TYPE })
@Retention(RetentionPolicy.RUNTIME)
public @interface Subscriber
{
boolean async() default true;
}