diff options
Diffstat (limited to 'sandbox/SPI/implementation-spi-impl/src/main/java/org/apache/tuscany/spi/implementation/impl/ImplTargetInvoker.java')
-rw-r--r-- | sandbox/SPI/implementation-spi-impl/src/main/java/org/apache/tuscany/spi/implementation/impl/ImplTargetInvoker.java | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/sandbox/SPI/implementation-spi-impl/src/main/java/org/apache/tuscany/spi/implementation/impl/ImplTargetInvoker.java b/sandbox/SPI/implementation-spi-impl/src/main/java/org/apache/tuscany/spi/implementation/impl/ImplTargetInvoker.java new file mode 100644 index 0000000000..d734f6e060 --- /dev/null +++ b/sandbox/SPI/implementation-spi-impl/src/main/java/org/apache/tuscany/spi/implementation/impl/ImplTargetInvoker.java @@ -0,0 +1,123 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you 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.apache.tuscany.spi.implementation.impl; + +import java.lang.reflect.InvocationTargetException; + +import org.apache.tuscany.spi.Scope; +import org.apache.tuscany.spi.component.ComponentException; +import org.apache.tuscany.spi.component.InstanceWrapper; +import org.apache.tuscany.spi.component.InvalidConversationSequenceException; +import org.apache.tuscany.spi.component.ScopeContainer; +import org.apache.tuscany.spi.component.TargetException; +import org.apache.tuscany.spi.component.WorkContext; +import org.apache.tuscany.spi.extension.TargetInvokerExtension; +import org.apache.tuscany.spi.implementation.Invoker; + +/** + * Perform the actual script invocation + * TODO: move vertually all of this to SPI TargetInvokerExtension + */ +@SuppressWarnings("deprecation") +public class ImplTargetInvoker<T> extends TargetInvokerExtension { + + protected Object clazz; + protected Invoker invoker; + + private final ImplAtomicComponent component; + private final ScopeContainer scopeContainer; + protected InstanceWrapper<T> target; + protected boolean stateless; + + public ImplTargetInvoker(Invoker invoker, + ImplAtomicComponent component, + ScopeContainer scopeContainer, + WorkContext workContext) { + + this.invoker = invoker; + this.component = component; + this.scopeContainer = scopeContainer; + stateless = Scope.STATELESS == scopeContainer.getScope(); + + // TODO: support script classes + } + + @SuppressWarnings("unchecked") + public Object invokeTarget(Object payload, short sequence, WorkContext workContext) throws InvocationTargetException { + Object contextId = workContext.getIdentifier(scopeContainer.getScope()); + try { + + InstanceWrapper<T> wrapper = getInstance(sequence, contextId); + Object instance = wrapper.getInstance(); + + Object ret = invoker.invoke(instance, (Object[])payload); + + scopeContainer.returnWrapper(component, wrapper, contextId); + if (sequence == END) { + // if end conversation, remove resource + scopeContainer.remove(component); + } + + return ret; + + } catch (ComponentException e) { + throw new InvocationTargetException(e); + } + } + + @SuppressWarnings("unchecked") + @Override + public ImplTargetInvoker clone() throws CloneNotSupportedException { + try { + ImplTargetInvoker invoker = (ImplTargetInvoker)super.clone(); + invoker.target = null; + return invoker; + } catch (CloneNotSupportedException e) { + return null; // will not happen + } + } + + /** + * Resolves the target service instance or returns a cached one + */ + @SuppressWarnings("unchecked") + protected InstanceWrapper<T> getInstance(short sequence, Object contextId) throws TargetException { + switch (sequence) { + case NONE: + if (cacheable) { + if (target == null) { + target = scopeContainer.getWrapper(component, contextId); + } + return target; + } else { + return scopeContainer.getWrapper(component, contextId); + } + case START: + assert !cacheable; + return scopeContainer.getWrapper(component, contextId); + case CONTINUE: + case END: + assert !cacheable; + return scopeContainer.getAssociatedWrapper(component, contextId); + default: + throw new InvalidConversationSequenceException("Unknown sequence type", String.valueOf(sequence)); + } + } +} |