org.fabric3.fabric.builder.ChannelConnectorImpl Maven / Gradle / Ivy
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/*
* Fabric3
* Copyright (c) 2009-2013 Metaform Systems
*
* Fabric3 is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as
* published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version, with the
* following exception:
*
* Linking this software statically or dynamically with other
* modules is making a combined work based on this software.
* Thus, the terms and conditions of the GNU General Public
* License cover the whole combination.
*
* As a special exception, the copyright holders of this software
* give you permission to link this software with independent
* modules to produce an executable, regardless of the license
* terms of these independent modules, and to copy and distribute
* the resulting executable under terms of your choice, provided
* that you also meet, for each linked independent module, the
* terms and conditions of the license of that module. An
* independent module is a module which is not derived from or
* based on this software. If you modify this software, you may
* extend this exception to your version of the software, but
* you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version.
*
* Fabric3 is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details.
*
* You should have received a copy of the
* GNU General Public License along with Fabric3.
* If not, see , SourceConnectionAttacher> sourceAttachers;
private Map, TargetConnectionAttacher> targetAttachers;
private Map, EventFilterBuilder> filterBuilders;
private Map, EventStreamHandlerBuilder> handlerBuilders;
private ClassLoaderRegistry classLoaderRegistry;
private TransformerRegistry transformerRegistry;
public ChannelConnectorImpl() {
}
@Reference
public void setClassLoaderRegistry(ClassLoaderRegistry classLoaderRegistry) {
this.classLoaderRegistry = classLoaderRegistry;
}
@Reference
public void setTransformerRegistry(TransformerRegistry transformerRegistry) {
this.transformerRegistry = transformerRegistry;
}
@Reference(required = false)
public void setSourceAttachers(Map,
SourceConnectionAttacher> sourceAttachers) {
this.sourceAttachers = sourceAttachers;
}
@Reference(required = false)
public void setTargetAttachers(Map,
TargetConnectionAttacher> targetAttachers) {
this.targetAttachers = targetAttachers;
}
@Reference(required = false)
public void setFilterBuilders(Map, EventFilterBuilder>
filterBuilders) {
this.filterBuilders = filterBuilders;
}
@Reference(required = false)
public void setHandlerBuilders(Map, EventStreamHandlerBuilder>
handlerBuilders) {
this.handlerBuilders = handlerBuilders;
}
@SuppressWarnings({"unchecked"})
public void connect(PhysicalChannelConnectionDefinition definition) throws BuilderException {
PhysicalConnectionSourceDefinition source = definition.getSource();
PhysicalConnectionTargetDefinition target = definition.getTarget();
SourceConnectionAttacher sourceAttacher = sourceAttachers.get(source.getClass());
if (sourceAttacher == null) {
throw new AttacherNotFoundException("Attacher not found for type: " + source.getClass().getName());
}
TargetConnectionAttacher targetAttacher = targetAttachers.get(target.getClass());
if (targetAttacher == null) {
throw new AttacherNotFoundException("Attacher not found for type: " + target.getClass().getName());
}
ChannelConnection connection = createConnection(definition);
sourceAttacher.attach(source, target, connection);
targetAttacher.attach(source, target, connection);
}
@SuppressWarnings({"unchecked"})
public void disconnect(PhysicalChannelConnectionDefinition definition) throws BuilderException {
PhysicalConnectionSourceDefinition source = definition.getSource();
PhysicalConnectionTargetDefinition target = definition.getTarget();
SourceConnectionAttacher sourceAttacher = sourceAttachers.get(source.getClass());
if (sourceAttacher == null) {
throw new AttacherNotFoundException("Attacher not found for type: " + source.getClass().getName());
}
TargetConnectionAttacher targetAttacher = targetAttachers.get(target.getClass());
if (targetAttacher == null) {
throw new AttacherNotFoundException("Attacher not found for type: " + target.getClass().getName());
}
sourceAttacher.detach(source, target);
targetAttacher.detach(source, target);
}
/**
* Creates the connection.
*
* @param definition the connection definition
* @return the connection
* @throws BuilderException if there is an error creating the connection
*/
private ChannelConnection createConnection(PhysicalChannelConnectionDefinition definition) throws BuilderException {
ClassLoader loader = classLoaderRegistry.getClassLoader(definition.getTarget().getClassLoaderId());
PhysicalEventStreamDefinition streamDefinition = definition.getEventStream();
EventStream stream = new EventStreamImpl(streamDefinition);
addTransformer(streamDefinition, stream, loader);
addFilters(streamDefinition, stream);
addHandlers(streamDefinition, stream);
int sequence = definition.getSource().getSequence();
return new ChannelConnectionImpl(stream, sequence);
}
/**
* Adds event transformers to convert an event from one format to another.
*
* @param streamDefinition the stream definition
* @param stream the stream being created
* @param loader the target classloader to use for the transformation
* @throws BuilderException if there is an error adding a filter
*/
@SuppressWarnings({"unchecked"})
private void addTransformer(PhysicalEventStreamDefinition streamDefinition, EventStream stream, ClassLoader loader) throws BuilderException {
if (transformerRegistry == null) {
// no transformer registry configured (e.g. during bootstrap) so skip
return;
}
List eventTypes = streamDefinition.getEventTypes();
String stringifiedType = eventTypes.get(0);
try {
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