org.glassfish.api.invocation.InvocationManagerImpl Maven / Gradle / Ivy
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// Portions Copyright [2016-2017] [Payara Foundation and/or its affiliates]
package org.glassfish.api.invocation;
import static org.glassfish.api.invocation.ComponentInvocation.ComponentInvocationType.EJB_INVOCATION;
import static org.glassfish.api.invocation.ComponentInvocation.ComponentInvocationType.SERVICE_STARTUP;
import static org.glassfish.api.invocation.ComponentInvocation.ComponentInvocationType.SERVLET_INVOCATION;
import static org.glassfish.api.invocation.ComponentInvocation.ComponentInvocationType.UN_INITIALIZED;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Stack;
import javax.inject.Inject;
import javax.inject.Singleton;
import org.glassfish.api.invocation.ComponentInvocation.ComponentInvocationType;
import org.glassfish.hk2.api.IterableProvider;
import org.jvnet.hk2.annotations.Optional;
import org.jvnet.hk2.annotations.Service;
@Service
@Singleton
public class InvocationManagerImpl implements InvocationManager {
// This TLS variable stores an ArrayList.
// The ArrayList contains ComponentInvocation objects which represent
// the stack of invocations on this thread. Accesses to the ArrayList
// don't need to be synchronized because each thread has its own ArrayList.
private InheritableThreadLocal> frames;
private final ThreadLocal> applicationEnvironments = new ThreadLocal>() {
@Override
protected Stack initialValue() {
return new Stack();
}
};
private Map> regCompInvHandlerMap = new HashMap>();
private final ComponentInvocationHandler[] invHandlers;
public InvocationManagerImpl() {
this(null);
}
@Inject
private InvocationManagerImpl(@Optional IterableProvider handlers) {
if (handlers == null) {
invHandlers = null;
} else {
LinkedList localHandlers = new LinkedList();
for (ComponentInvocationHandler handler : handlers) {
localHandlers.add(handler);
}
if (localHandlers.size() > 0) {
invHandlers = localHandlers.toArray(new ComponentInvocationHandler[localHandlers.size()]);
} else {
invHandlers = null;
}
}
frames = new InheritableThreadLocal>() {
protected InvocationArray initialValue() {
return new InvocationArray<>();
}
protected InvocationArray childValue(InvocationArray parentValue) {
return computeChildTheadInvocation(parentValue);
}
};
}
@SuppressWarnings("unchecked")
@Override
public void setThreadInheritableInvocation(List parentValue) {
frames.set(computeChildTheadInvocation((InvocationArray) parentValue));
}
public void preInvoke(T invocation) throws InvocationException {
InvocationArray invocationArray = frames.get();
if (invocation.getInvocationType() == SERVICE_STARTUP) {
invocationArray.setInvocationAttribute(SERVICE_STARTUP);
return;
}
int beforeSize = invocationArray.size();
ComponentInvocation previousInvocation = beforeSize > 0 ? invocationArray.get(beforeSize - 1) : null;
// If ejb call EJBSecurityManager, for servlet call RealmAdapter
ComponentInvocationType invocationType = invocation.getInvocationType();
if (invHandlers != null) {
for (ComponentInvocationHandler handler : invHandlers) {
handler.beforePreInvoke(invocationType, previousInvocation, invocation);
}
}
List setCIH = regCompInvHandlerMap.get(invocationType);
if (setCIH != null) {
for (int i = 0; i < setCIH.size(); i++) {
setCIH.get(i).getComponentInvocationHandler().beforePreInvoke(invocationType, previousInvocation, invocation);
}
}
// Push this invocation on the stack
invocationArray.add(invocation);
if (invHandlers != null) {
for (ComponentInvocationHandler handler : invHandlers) {
handler.afterPreInvoke(invocationType, previousInvocation, invocation);
}
}
if (setCIH != null) {
for (int i = 0; i < setCIH.size(); i++) {
setCIH.get(i).getComponentInvocationHandler().afterPreInvoke(invocationType, previousInvocation, invocation);
}
}
}
public void postInvoke(T invocation) throws InvocationException {
// Get this thread's ArrayList
InvocationArray invocationArray = frames.get();
if (invocation.getInvocationType() == SERVICE_STARTUP) {
invocationArray.setInvocationAttribute(UN_INITIALIZED);
return;
}
int beforeSize = invocationArray.size();
if (beforeSize == 0) {
throw new InvocationException();
}
ComponentInvocation prevInv = beforeSize > 1 ? invocationArray.get(beforeSize - 2) : null;
ComponentInvocation curInv = invocationArray.get(beforeSize - 1);
try {
ComponentInvocationType invType = invocation.getInvocationType();
if (invHandlers != null) {
for (ComponentInvocationHandler handler : invHandlers) {
handler.beforePostInvoke(invType, prevInv, curInv);
}
}
List setCIH = regCompInvHandlerMap.get(invType);
if (setCIH != null) {
for (int i = 0; i < setCIH.size(); i++) {
setCIH.get(i).getComponentInvocationHandler().beforePostInvoke(invType, prevInv, curInv);
}
}
} finally {
// pop the stack
invocationArray.remove(beforeSize - 1);
if (invHandlers != null) {
for (ComponentInvocationHandler handler : invHandlers) {
handler.afterPostInvoke(invocation.getInvocationType(), prevInv, invocation);
}
}
ComponentInvocationType invType = invocation.getInvocationType();
List setCIH = regCompInvHandlerMap.get(invType);
if (setCIH != null) {
for (int i = 0; i < setCIH.size(); i++) {
setCIH.get(i).getComponentInvocationHandler().afterPostInvoke(invType, prevInv, curInv);
}
}
}
}
/**
* return true iff no invocations on the stack for this thread
* @return
*/
@Override
public boolean isInvocationStackEmpty() {
InvocationArray v = frames.get();
return v == null || v.size() == 0;
}
/**
* return the Invocation object of the component being called
* @param
* @return
*/
@Override
@SuppressWarnings("unchecked")
public T getCurrentInvocation() {
InvocationArray v = frames.get();
int size = v.size();
if (size == 0) {
return null;
}
return (T) v.get(size - 1);
}
/**
* return the Invocation object of the caller
* return null if none exist (e.g. caller is from another VM)
* @param
* @return
*/
@Override
@SuppressWarnings("unchecked")
public T getPreviousInvocation() throws InvocationException {
InvocationArray v = frames.get();
int i = v.size();
if (i < 2) {
return null;
}
return (T) v.get(i - 2);
}
@Override
public List getAllInvocations() {
return frames.get();
}
@Override
public List popAllInvocations() {
List result = frames.get();
frames.set(null);
return result;
}
@Override
@SuppressWarnings("unchecked")
public void putAllInvocations(List invocations) {
frames.set(new InvocationArray<>((List) invocations));
}
private InvocationArray computeChildTheadInvocation(InvocationArray parentValue) {
// Always creates a new ArrayList
InvocationArray childInvocationArray = new InvocationArray();
InvocationArray parentInvocationArray = parentValue;
if (parentInvocationArray != null && parentInvocationArray.size() > 0 && parentInvocationArray.outsideStartup()) {
// Get current invocation
ComponentInvocation parrentInvocation = parentInvocationArray.get(parentInvocationArray.size() - 1);
// TODO: The following is ugly. The logic of what needs to be in the
// new ComponentInvocation should be with the respective container
if (parrentInvocation.getInvocationType() == SERVLET_INVOCATION) {
// If this is a thread created by user in servlet's service method
// create a new ComponentInvocation with transaction
// left to null and instance left to null
// so that the resource won't be enlisted or registered
ComponentInvocation invocation = new ComponentInvocation();
invocation.setComponentInvocationType(parrentInvocation.getInvocationType());
invocation.setComponentId(parrentInvocation.getComponentId());
invocation.setContainer(parrentInvocation.getContainer());
invocation.setJndiEnvironment(parrentInvocation.getJndiEnvironment());
childInvocationArray.add(invocation);
} else if (parrentInvocation.getInvocationType() != EJB_INVOCATION) {
// Push a copy of invocation onto the new result
// ArrayList
ComponentInvocation cpy = new ComponentInvocation();
cpy.componentId = parrentInvocation.getComponentId();
cpy.setComponentInvocationType(parrentInvocation.getInvocationType());
cpy.instance = parrentInvocation.getInstance();
cpy.container = parrentInvocation.getContainerContext();
cpy.transaction = parrentInvocation.getTransaction();
childInvocationArray.add(cpy);
}
}
return childInvocationArray;
}
static class InvocationArray extends ArrayList {
private static final long serialVersionUID = 1L;
private ComponentInvocationType invocationAttribute;
private InvocationArray(List invocations) {
super(invocations);
}
private InvocationArray() {
}
public void setInvocationAttribute(ComponentInvocationType attribute) {
this.invocationAttribute = attribute;
}
public ComponentInvocationType getInvocationAttribute() {
return invocationAttribute;
}
public boolean outsideStartup() {
return getInvocationAttribute() != SERVICE_STARTUP;
}
}
@Override
public void registerComponentInvocationHandler(ComponentInvocationType type, RegisteredComponentInvocationHandler handler) {
List setRegCompInvHandlers = regCompInvHandlerMap.get(type);
if (setRegCompInvHandlers == null) {
setRegCompInvHandlers = new ArrayList();
regCompInvHandlerMap.put(type, setRegCompInvHandlers);
}
if (setRegCompInvHandlers.size() == 0) {
setRegCompInvHandlers.add(handler);
}
}
@Override
public void pushAppEnvironment(ApplicationEnvironment env) {
Stack stack = applicationEnvironments.get();
stack.push(env);
}
@Override
public ApplicationEnvironment peekAppEnvironment() {
Stack stack = applicationEnvironments.get();
if (stack.isEmpty()) {
return null;
}
return stack.peek();
}
@Override
public void popAppEnvironment() {
Stack stack = applicationEnvironments.get();
if (!stack.isEmpty()) {
stack.pop();
}
}
}
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