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Client library for EJB applications working against Wildfly - Java EE Variant
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/*
* JBoss, Home of Professional Open Source.
* Copyright 2017 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* 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.jboss.ejb.client;
import static java.security.AccessController.doPrivileged;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.lang.reflect.Method;
import java.net.URI;
import java.net.URL;
import java.nio.charset.StandardCharsets;
import java.security.PrivilegedAction;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.concurrent.atomic.AtomicReferenceFieldUpdater;
import java.util.function.Supplier;
import java.util.stream.Collectors;
import org.jboss.ejb._private.Keys;
import org.jboss.ejb._private.Logs;
import org.jboss.ejb.protocol.remote.RemotingEJBClientInterceptor;
import org.wildfly.common.Assert;
import org.wildfly.common.context.ContextManager;
import org.wildfly.common.context.Contextual;
import org.wildfly.discovery.Discovery;
import org.wildfly.discovery.ServiceType;
import org.wildfly.naming.client.NamingProvider;
import org.wildfly.security.auth.client.AuthenticationContext;
/**
* The public API for an Enterprise Bean client context. An Enterprise Bean client context may be associated with (and used by) one or more threads concurrently.
*
* @author David M. Lloyd
*/
public final class EJBClientContext extends Attachable implements Contextual {
/**
* The service type to use for Enterprise Beans discovery.
*/
public static final ServiceType EJB_SERVICE_TYPE = ServiceType.of("ejb", "jboss");
private static final ContextManager CONTEXT_MANAGER = new ContextManager(EJBClientContext.class, "jboss.ejb.client");
private static final Supplier DISCOVERY_SUPPLIER = doPrivileged((PrivilegedAction>) Discovery.getContextManager()::getPrivilegedSupplier);
private static final Supplier GETTER = doPrivileged((PrivilegedAction>) CONTEXT_MANAGER::getPrivilegedSupplier);
private static final EJBTransportProvider[] NO_TRANSPORT_PROVIDERS = new EJBTransportProvider[0];
private static final EJBClientInterceptor.Registration[] NO_INTERCEPTORS = new EJBClientInterceptor.Registration[0];
private static final AtomicReferenceFieldUpdater registrationsUpdater = AtomicReferenceFieldUpdater.newUpdater(EJBClientContext.class, EJBClientInterceptor.Registration[].class, "registrations");
private volatile EJBClientInterceptor.Registration[] registrations = NO_INTERCEPTORS;
/**
* The discovery attribute name which contains the application and module name of the located Enterprise Beans.
*/
public static final String FILTER_ATTR_EJB_MODULE = "ejb-module";
/**
* The discovery attribute name which contains the application and module name with the distinct name of the located Enterprise Beans.
*/
public static final String FILTER_ATTR_EJB_MODULE_DISTINCT = "ejb-module-distinct";
/**
* The discovery attribute name which contains a node name.
*/
public static final String FILTER_ATTR_NODE = "node";
/**
* The discovery attribute name which contains a cluster name.
*/
public static final String FILTER_ATTR_CLUSTER = "cluster";
/**
* The discovery attribute name for when a rule only applies to a specific source IP address range.
*/
public static final String FILTER_ATTR_SOURCE_IP = "source-ip";
private static final int MAX_SESSION_RETRIES = 8;
private static final Logs log = Logs.MAIN;
static {
CONTEXT_MANAGER.setGlobalDefaultSupplier(EJBClientContext::getDefault);
}
static EJBClientContext getDefault() {
return ConfigurationBasedEJBClientContextSelector.get();
}
private final EJBTransportProvider[] transportProviders;
private final long invocationTimeout;
private final EJBReceiverContext receiverContext;
private final List configuredConnections;
private final Map configuredClusters;
private final ClusterNodeSelector clusterNodeSelector;
private final DeploymentNodeSelector deploymentNodeSelector;
private final ClassValue> proxyInfoValue = new ClassValue>() {
protected EJBProxyInterceptorInformation computeValue(final Class type) {
return EJBProxyInterceptorInformation.construct(type, EJBClientContext.this);
}
};
static final InterceptorList defaultInterceptors = new InterceptorList(new EJBClientInterceptorInformation[] {
EJBClientInterceptorInformation.forClass(TransactionInterceptor.class),
EJBClientInterceptorInformation.forClass(AuthenticationContextEJBClientInterceptor.class),
EJBClientInterceptorInformation.forClass(NamingEJBClientInterceptor.class),
EJBClientInterceptorInformation.forClass(DiscoveryEJBClientInterceptor.class),
EJBClientInterceptorInformation.forClass(TransactionPostDiscoveryInterceptor.class),
EJBClientInterceptorInformation.forClass(RemotingEJBClientInterceptor.class),
});
private final InterceptorList classPathInterceptors;
private final InterceptorList globalInterceptors;
private final Map configuredPerClassInterceptors;
private final Map> configuredPerMethodInterceptors;
private final int maximumConnectedClusterNodes;
private final int defaultCompression;
EJBClientContext(Builder builder) {
log.tracef("Creating new EJBClientContext: %s", this);
final List builderTransportProviders = builder.transportProviders;
if (builderTransportProviders == null || builderTransportProviders.isEmpty()) {
transportProviders = NO_TRANSPORT_PROVIDERS;
log.tracef("New EJBClientContext %s contains no transport providers", this);
} else {
transportProviders = builderTransportProviders.toArray(new EJBTransportProvider[builderTransportProviders.size()]);
}
invocationTimeout = builder.invocationTimeout;
receiverContext = new EJBReceiverContext(this);
final List clientConnections = builder.clientConnections;
if (clientConnections == null || clientConnections.isEmpty()) {
configuredConnections = Collections.emptyList();
log.tracef("New EJBClientContext %s contains no configured connections", this);
} else if (clientConnections.size() == 1) {
if (log.isTraceEnabled())
log.tracef("New EJBClientContext %s contains one configured connection: %s", this, clientConnections.get(0));
configuredConnections = Collections.singletonList(clientConnections.get(0));
} else {
configuredConnections = Collections.unmodifiableList(new ArrayList<>(clientConnections));
if (log.isTraceEnabled()) {
StringBuffer buffer = new StringBuffer();
Iterator iterator = configuredConnections.iterator();
buffer.append(clientConnections.iterator().next());
while (iterator.hasNext())
buffer.append(", ").append(iterator.next());
log.tracef("New EJBClientContext %s contains configured connections: %s", this, buffer);
}
}
final List clientClusters = builder.clientClusters;
if (clientClusters == null || clientClusters.isEmpty()) {
configuredClusters = Collections.emptyMap();
} else if (clientClusters.size() == 1) {
final EJBClientCluster clientCluster = clientClusters.get(0);
configuredClusters = Collections.singletonMap(clientCluster.getName(), clientCluster);
log.tracef("New EJBClientContext %s contains configured cluster: %s", this, clientCluster);
} else {
Map map = new HashMap<>();
for (EJBClientCluster clientCluster : clientClusters) {
map.put(clientCluster.getName(), clientCluster);
log.tracef("New EJBClientContext %s contains configured cluster: %s", this, clientCluster);
}
configuredClusters = Collections.unmodifiableMap(map);
}
clusterNodeSelector = builder.clusterNodeSelector;
deploymentNodeSelector = builder.deploymentNodeSelector;
maximumConnectedClusterNodes = builder.maximumConnectedClusterNodes;
defaultCompression = builder.defaultCompression;
log.tracef("New EJBClientContext %s contains cluster configuration: node selector=%s, deployment selector=%s, maximum nodes=%s",
this, clusterNodeSelector, deploymentNodeSelector, maximumConnectedClusterNodes);
// global interceptors
final List globalInterceptors = builder.globalInterceptors;
if (globalInterceptors != null) {
final Iterator globalInterceptorsIterator = globalInterceptors.iterator();
if (globalInterceptorsIterator.hasNext()) {
final EJBClientInterceptorInformation first = globalInterceptorsIterator.next();
if (globalInterceptorsIterator.hasNext()) {
// two or more
final ArrayList arrayList = new ArrayList<>();
arrayList.add(first);
do {
arrayList.add(globalInterceptorsIterator.next());
} while (globalInterceptorsIterator.hasNext());
if (arrayList.isEmpty()) {
this.globalInterceptors = InterceptorList.EMPTY;
} else {
this.globalInterceptors = new InterceptorList(arrayList.toArray(EJBClientInterceptorInformation.NO_INTERCEPTORS));
}
} else {
// just one
this.globalInterceptors = first.getSingletonList();
}
} else {
this.globalInterceptors = InterceptorList.EMPTY;
}
} else {
this.globalInterceptors = InterceptorList.EMPTY;
}
// class path interceptors
this.classPathInterceptors = System.getSecurityManager() != null? doPrivileged((PrivilegedAction) EJBClientContext::getClassPathInterceptorList)
: getClassPathInterceptorList();
// configured per-class interceptors
final List classInterceptors = builder.classInterceptors;
if (classInterceptors != null) {
final Iterator classInterceptorsIterator = classInterceptors.iterator();
if (classInterceptorsIterator.hasNext()) {
final HashMap> map = new HashMap<>();
do {
final ClassInterceptor classInterceptor = classInterceptorsIterator.next();
map.computeIfAbsent(classInterceptor.getClassName(), ignored -> new ArrayList<>()).add(classInterceptor.getInterceptor());
} while (classInterceptorsIterator.hasNext());
final Iterator>> mapIterator = map.entrySet().iterator();
if (mapIterator.hasNext()) {
final Map.Entry> first = mapIterator.next();
if (mapIterator.hasNext()) {
Map targetMap = new HashMap<>(map.size());
targetMap.put(first.getKey(), InterceptorList.ofList(first.getValue()));
do {
final Map.Entry> next = mapIterator.next();
targetMap.put(next.getKey(), InterceptorList.ofList(next.getValue()));
} while (mapIterator.hasNext());
this.configuredPerClassInterceptors = targetMap;
} else {
this.configuredPerClassInterceptors = Collections.singletonMap(first.getKey(), InterceptorList.ofList(first.getValue()));
}
} else {
this.configuredPerClassInterceptors = Collections.emptyMap();
}
} else {
this.configuredPerClassInterceptors = Collections.emptyMap();
}
} else {
this.configuredPerClassInterceptors = Collections.emptyMap();
}
// configured per-method interceptors
final List methodInterceptors = builder.methodInterceptors;
if (methodInterceptors != null) {
final Iterator methodInterceptorIterator = methodInterceptors.iterator();
if (methodInterceptorIterator.hasNext()) {
final HashMap>> map = new HashMap<>();
do {
final MethodInterceptor methodInterceptor = methodInterceptorIterator.next();
map.computeIfAbsent(methodInterceptor.getClassName(), ignored -> new HashMap<>()).computeIfAbsent(methodInterceptor.getMethodLocator(), ignored -> new ArrayList<>()).add(methodInterceptor.getInterceptor());
} while (methodInterceptorIterator.hasNext());
final Iterator>>> outerIter = map.entrySet().iterator();
if (outerIter.hasNext()) {
final Map.Entry>> first = outerIter.next();
if (outerIter.hasNext()) {
Map> targetMap = new HashMap<>(map.size());
targetMap.put(first.getKey(), calculateMethodInterceptors(first.getValue()));
do {
final Map.Entry>> next = outerIter.next();
targetMap.put(next.getKey(), calculateMethodInterceptors(next.getValue()));
} while (outerIter.hasNext());
this.configuredPerMethodInterceptors = targetMap;
} else {
this.configuredPerMethodInterceptors = Collections.singletonMap(first.getKey(), calculateMethodInterceptors(first.getValue()));
}
} else {
this.configuredPerMethodInterceptors = Collections.emptyMap();
}
} else {
this.configuredPerMethodInterceptors = Collections.emptyMap();
}
} else {
this.configuredPerMethodInterceptors = Collections.emptyMap();
}
if (log.isTraceEnabled()) {
if (globalInterceptors != null)
for (EJBClientInterceptorInformation ejbClientInterceptorInformation : globalInterceptors)
log.tracef("New EJBClientContext %s contains global interceptor: %s", this,
ejbClientInterceptorInformation);
if (classPathInterceptors != null)
for (EJBClientInterceptorInformation ejbClientInterceptorInformation : classPathInterceptors.getInformation())
log.tracef("New EJBClientContext %s contains class path interceptor: %s", this,
ejbClientInterceptorInformation);
if (configuredPerClassInterceptors != null)
for (Map.Entry entry : configuredPerClassInterceptors.entrySet())
log.tracef("New EJBClientContext %s contains class interceptor: class=%s, intercpetor=%s", this,
entry.getKey(), entry.getValue().getInformation());
if (configuredPerMethodInterceptors != null)
for (Map.Entry> classEntry : configuredPerMethodInterceptors.entrySet())
for (Map.Entry methodEntry : classEntry.getValue().entrySet())
log.tracef("New EJBClientContext %s contains method interceptor: class=%s, method=%s, interceptor=%s",
this, classEntry.getKey(), methodEntry.getKey(), methodEntry.getValue());
}
// this must be last
for (EJBTransportProvider transportProvider : transportProviders) {
log.tracef("New EJBClientContext %s notifying transport provider: %s", this, transportProvider);
transportProvider.notifyRegistered(receiverContext);
}
}
private static Map calculateMethodInterceptors(final HashMap> map) {
final Iterator>> iterator = map.entrySet().iterator();
if (iterator.hasNext()) {
final Map.Entry> first = iterator.next();
if (iterator.hasNext()) {
HashMap targetMap = new HashMap<>(map.size());
targetMap.put(first.getKey(), InterceptorList.ofList(first.getValue()));
do {
final Map.Entry> next = iterator.next();
targetMap.put(next.getKey(), InterceptorList.ofList(next.getValue()));
} while (iterator.hasNext());
return targetMap;
} else {
return Collections.singletonMap(first.getKey(), InterceptorList.ofList(first.getValue()));
}
} else {
return Collections.emptyMap();
}
}
static InterceptorList getClassPathInterceptorList() {
ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
try {
final Enumeration resources = classLoader.getResources("META-INF/services/org.jboss.ejb.client.EJBClientInterceptor");
if (resources.hasMoreElements()) {
final ArrayList list = new ArrayList<>();
do {
final URL url = resources.nextElement();
try (InputStream st = url.openStream()) {
try (InputStreamReader isr = new InputStreamReader(st, StandardCharsets.UTF_8)) {
try (BufferedReader r = new BufferedReader(isr)) {
String line;
while ((line = r.readLine()) != null) {
line = line.trim();
if (line.isEmpty() || line.charAt(0) == '#') {
continue;
}
try {
final Class interceptorClass = Class.forName(line, true, classLoader).asSubclass(EJBClientInterceptor.class);
list.add(EJBClientInterceptorInformation.forClass(interceptorClass));
} catch (ClassNotFoundException e) {
// skip
}
}
}
}
}
} while (resources.hasMoreElements());
if (list.isEmpty()) {
return InterceptorList.EMPTY;
} else {
return new InterceptorList(list.toArray(EJBClientInterceptorInformation.NO_INTERCEPTORS));
}
} else {
return InterceptorList.EMPTY;
}
} catch (IOException e) {
return InterceptorList.EMPTY;
}
}
/**
* Register a client interceptor with this client context.
*
* If the passed clientInterceptor is already added to this context, then this method just returns the
* old {@link org.jboss.ejb.client.EJBClientInterceptor.Registration}.
*
*
* Note: If an interceptor is added or removed after a proxy is used, this will not affect the proxy interceptor list.
*
*
* @param priority the absolute priority of this interceptor (lower runs earlier; higher runs later)
* @param clientInterceptor the interceptor to register
* @return a handle which may be used to later remove this registration
*
* @deprecated Please use EJBClientContext.Builder to manipulate the EJBClientInterceptors.
*/
@Deprecated
public EJBClientInterceptor.Registration registerInterceptor(final int priority, final EJBClientInterceptor clientInterceptor) throws IllegalArgumentException {
Assert.checkNotNullParam("clientInterceptor", clientInterceptor);
final EJBClientInterceptor.Registration newRegistration = new EJBClientInterceptor.Registration(this, clientInterceptor, priority);
EJBClientInterceptor.Registration[] oldRegistrations, newRegistrations;
do {
oldRegistrations = registrations;
for (EJBClientInterceptor.Registration oldRegistration : oldRegistrations) {
if (oldRegistration.getInterceptor() == clientInterceptor) {
if (oldRegistration.compareTo(newRegistration) == 0) {
// This means that a client interceptor which has already been added to this context,
// is being added with the same priority. In such cases, this new registration request
// is effectively a no-op and we just return the old registration
return oldRegistration;
}
}
}
final int length = oldRegistrations.length;
newRegistrations = Arrays.copyOf(oldRegistrations, length + 1);
newRegistrations[length] = newRegistration;
Arrays.sort(newRegistrations);
} while (!registrationsUpdater.compareAndSet(this, oldRegistrations, newRegistrations));
return newRegistration;
}
/**
* Removes the EJBClientInterceptor from current registrations. It is used by EJBClientInterceptor.Registration itself.
*
* Note: If an interceptor is added or removed after a proxy is used, this will not affect the proxy interceptor list.
*
*
* @param registration the EJBClientInterceptor registration handler
*
* @deprecated Please use EJBClientContext.Builder to manipulate the EJBClientInterceptors.
*/
@Deprecated
void removeInterceptor(final EJBClientInterceptor.Registration registration) {
EJBClientInterceptor.Registration[] oldRegistrations, newRegistrations;
do {
oldRegistrations = registrations;
newRegistrations = null;
final int length = oldRegistrations.length;
final int newLength = length - 1;
if (length == 1) {
if (oldRegistrations[0] == registration) {
newRegistrations = NO_INTERCEPTORS;
}
} else {
for (int i = 0; i < length; i++) {
if (oldRegistrations[i] == registration) {
if (i == newLength) {
newRegistrations = Arrays.copyOf(oldRegistrations, newLength);
break;
} else {
newRegistrations = new EJBClientInterceptor.Registration[newLength];
if (i > 0) System.arraycopy(oldRegistrations, 0, newRegistrations, 0, i);
System.arraycopy(oldRegistrations, i + 1, newRegistrations, i, newLength - i);
break;
}
}
}
}
if (newRegistrations == null) {
return;
}
} while (!registrationsUpdater.compareAndSet(this, oldRegistrations, newRegistrations));
}
/**
* Get the context manager. Simply calls the {@code static} method {@link #getContextManager()}.
*
* @return the context manager (not {@code null})
*/
public ContextManager getInstanceContextManager() {
return getContextManager();
}
/**
* Get the context manager.
*
* @return the context manager (not {@code null})
*/
public static ContextManager getContextManager() {
return CONTEXT_MANAGER;
}
/**
* Get the configured invocation timeout. A value of zero indicates that invocations never time out.
*
* @return the configured invocation timeout
*/
public long getInvocationTimeout() {
return invocationTimeout;
}
/**
* Get the pre-configured connections for this context. This information may not be used by some transport providers
* and mainly exists for legacy compatibility purposes.
*
* @return the pre-configured connections for this context (not {@code null})
*/
public List getConfiguredConnections() {
return configuredConnections;
}
/**
* Get the initially configured clusters for this context. The collection will not reflect any topology updates
* received from peers.
*
* @return the initially configured clusters for this context
*/
public Collection getInitialConfiguredClusters() {
return configuredClusters.values();
}
/**
* Get the maximum connected cluster nodes setting, for connection-based protocols which support eager connection.
*
* @return the maximum connected cluster nodes count
*/
public int getMaximumConnectedClusterNodes() {
return maximumConnectedClusterNodes;
}
/**
* Get a copy of this context with the given interceptor(s) added. If the array is {@code null} or empty, the
* current context is returned as-is.
*
* @param interceptors the interceptor(s) to add
* @return the new context (not {@code null})
*/
public EJBClientContext withAddedInterceptors(EJBClientInterceptor... interceptors) {
if (interceptors == null) {
return this;
}
final int length = interceptors.length;
if (length == 0) {
return this;
}
log.tracef("Creating new EJBClientContext from %s with added interceptors including %s", this, interceptors[0]);
final Builder builder = new Builder(this);
boolean construct = false;
for (EJBClientInterceptor interceptor : interceptors) {
if (interceptor != null) {
builder.addInterceptor(interceptor);
construct = true;
}
}
return construct ? builder.build() : this;
}
/**
* Get a copy of this context with the given transport provider(s) added. If the array is {@code null} or empty, the
* current context is returned as-is.
*
* @param transportProviders the transport providers(s) to add
* @return the new context (not {@code null})
*/
public EJBClientContext withAddedTransportProviders(EJBTransportProvider... transportProviders) {
if (transportProviders == null) {
return this;
}
final int length = transportProviders.length;
if (length == 0) {
return this;
}
log.tracef("Creating new EJBClientContext from %s with added transport providers including %s", this, transportProviders[0]);
final Builder builder = new Builder(this);
boolean construct = false;
for (EJBTransportProvider transportProvider : transportProviders) {
if (transportProvider != null) {
builder.addTransportProvider(transportProvider);
construct = true;
}
}
return construct ? builder.build() : this;
}
EJBReceiver getTransportProvider(final String scheme) {
for (EJBTransportProvider transportProvider : transportProviders) {
if (transportProvider.supportsProtocol(scheme)) {
return transportProvider.getReceiver(receiverContext, scheme);
}
}
return null;
}
Discovery getDiscovery() {
return DISCOVERY_SUPPLIER.get();
}
InterceptorList getInterceptors(final Class invokedProxy, final Method method) {
return proxyInfoValue.get(invokedProxy).getInterceptors(method);
}
InterceptorList getInterceptors(final Class invokedProxy) {
return proxyInfoValue.get(invokedProxy).getClassInterceptors();
}
/**
* Resolve the receiver for the given destination. If there is no handler then an exception is raised.
*
* @param destination the destination URI
* @param locator the locator to use for error reports (must not be {@code null})
* @return the resolved receiver (not {@code null})
*/
EJBReceiver resolveReceiver(final URI destination, final EJBLocator locator) {
if (destination == null) {
throw Logs.INVOCATION.noDestinationEstablished(locator);
}
final String scheme = destination.getScheme();
for (EJBTransportProvider transportProvider : transportProviders) {
if (transportProvider.supportsProtocol(scheme)) {
final EJBReceiver receiver = transportProvider.getReceiver(receiverContext, scheme);
if (receiver != null) return receiver;
}
}
throw Logs.INVOCATION.noEJBReceiverAvailable(destination);
}
ClusterNodeSelector getClusterNodeSelector() {
return clusterNodeSelector;
}
DeploymentNodeSelector getDeploymentNodeSelector() {
return deploymentNodeSelector;
}
public void close() {
for (EJBTransportProvider transportProvider : transportProviders) {
try {
transportProvider.close(receiverContext);
} catch (Exception e) {
log.exceptionDuringTransportProviderClose(e);
}
}
}
static final class ClassInterceptor {
private final String className;
private final EJBClientInterceptorInformation interceptor;
ClassInterceptor(final String className, final EJBClientInterceptorInformation interceptor) {
this.className = className;
this.interceptor = interceptor;
}
String getClassName() {
return className;
}
EJBClientInterceptorInformation getInterceptor() {
return interceptor;
}
}
static final class MethodInterceptor {
private final String className;
private final EJBMethodLocator methodLocator;
private final EJBClientInterceptorInformation interceptor;
MethodInterceptor(final String className, final EJBMethodLocator methodLocator, final EJBClientInterceptorInformation interceptor) {
this.className = className;
this.methodLocator = methodLocator;
this.interceptor = interceptor;
}
String getClassName() {
return className;
}
EJBMethodLocator getMethodLocator() {
return methodLocator;
}
EJBClientInterceptorInformation getInterceptor() {
return interceptor;
}
}
/**
* A builder for Enterprise Beans client contexts.
*/
public static final class Builder {
List globalInterceptors;
List classInterceptors;
List methodInterceptors;
List transportProviders;
List clientConnections;
List clientClusters;
ClusterNodeSelector clusterNodeSelector = ClusterNodeSelector.DEFAULT_PREFER_LOCAL;
DeploymentNodeSelector deploymentNodeSelector = DeploymentNodeSelector.RANDOM_PREFER_LOCAL;
long invocationTimeout;
int maximumConnectedClusterNodes = 10;
int defaultCompression = -1;
/**
* Construct a new instance.
*/
public Builder() {
}
Builder(final EJBClientContext clientContext) {
globalInterceptors = Arrays.stream(clientContext.globalInterceptors.getInformation()).collect(Collectors.toCollection(ArrayList::new));
classInterceptors = new ArrayList<>();
for (Map.Entry entry : clientContext.getConfiguredPerClassInterceptors().entrySet()) {
final String className = entry.getKey();
for (EJBClientInterceptorInformation information : entry.getValue().getInformation()) {
classInterceptors.add(new ClassInterceptor(className, information));
}
}
methodInterceptors = new ArrayList<>();
for (Map.Entry> entry : clientContext.getConfiguredPerMethodInterceptors().entrySet()) {
final String className = entry.getKey();
for (Map.Entry entry1 : entry.getValue().entrySet()) {
final EJBMethodLocator methodLocator = entry1.getKey();
for (EJBClientInterceptorInformation information : entry1.getValue().getInformation()) {
methodInterceptors.add(new MethodInterceptor(className, methodLocator, information));
}
}
}
transportProviders = new ArrayList<>();
Collections.addAll(transportProviders, clientContext.transportProviders);
clientConnections = new ArrayList<>();
clientConnections.addAll(clientContext.getConfiguredConnections());
clientClusters = new ArrayList<>();
clientClusters.addAll(clientContext.configuredClusters.values());
clusterNodeSelector = clientContext.clusterNodeSelector;
deploymentNodeSelector = clientContext.deploymentNodeSelector;
invocationTimeout = clientContext.invocationTimeout;
}
public Builder addInterceptor(EJBClientInterceptor interceptor) {
Assert.checkNotNullParam("interceptor", interceptor);
if (globalInterceptors == null) {
globalInterceptors = new ArrayList<>();
}
globalInterceptors.add(EJBClientInterceptorInformation.forInstance(interceptor));
return this;
}
public Builder addInterceptor(Class interceptorClass) {
Assert.checkNotNullParam("interceptorClass", interceptorClass);
if (globalInterceptors == null) {
globalInterceptors = new ArrayList<>();
}
globalInterceptors.add(EJBClientInterceptorInformation.forClass(interceptorClass));
return this;
}
public Builder addClassInterceptor(String className, EJBClientInterceptor interceptor) {
Assert.checkNotNullParam("className", className);
Assert.checkNotNullParam("interceptor", interceptor);
if (classInterceptors == null) {
classInterceptors = new ArrayList<>();
}
classInterceptors.add(new ClassInterceptor(className, EJBClientInterceptorInformation.forInstance(interceptor)));
return this;
}
public Builder addClassInterceptor(String className, Class interceptorClass) {
Assert.checkNotNullParam("className", className);
Assert.checkNotNullParam("interceptorClass", interceptorClass);
if (classInterceptors == null) {
classInterceptors = new ArrayList<>();
}
classInterceptors.add(new ClassInterceptor(className, EJBClientInterceptorInformation.forClass(interceptorClass)));
return this;
}
public Builder addMethodInterceptor(String className, EJBMethodLocator methodLocator, EJBClientInterceptor interceptor) {
Assert.checkNotNullParam("className", className);
Assert.checkNotNullParam("methodLocator", methodLocator);
Assert.checkNotNullParam("interceptor", interceptor);
if (methodInterceptors == null) {
methodInterceptors = new ArrayList<>();
}
methodInterceptors.add(new MethodInterceptor(className, methodLocator, EJBClientInterceptorInformation.forInstance(interceptor)));
return this;
}
public Builder addMethodInterceptor(String className, EJBMethodLocator methodLocator, Class interceptorClass) {
Assert.checkNotNullParam("className", className);
Assert.checkNotNullParam("methodLocator", methodLocator);
Assert.checkNotNullParam("interceptorClass", interceptorClass);
if (methodInterceptors == null) {
methodInterceptors = new ArrayList<>();
}
methodInterceptors.add(new MethodInterceptor(className, methodLocator, EJBClientInterceptorInformation.forClass(interceptorClass)));
return this;
}
public Builder addTransportProvider(EJBTransportProvider provider) {
Assert.checkNotNullParam("provider", provider);
if (transportProviders == null) {
transportProviders = new ArrayList<>();
}
transportProviders.add(provider);
return this;
}
public Builder addClientConnection(EJBClientConnection connection) {
Assert.checkNotNullParam("connection", connection);
if (clientConnections == null) {
clientConnections = new ArrayList<>();
}
clientConnections.add(connection);
return this;
}
public Builder addClientCluster(EJBClientCluster cluster) {
Assert.checkNotNullParam("cluster", cluster);
if (clientClusters == null) {
clientClusters = new ArrayList<>();
}
clientClusters.add(cluster);
return this;
}
public Builder setClusterNodeSelector(final ClusterNodeSelector clusterNodeSelector) {
Assert.checkNotNullParam("clusterNodeSelector", clusterNodeSelector);
this.clusterNodeSelector = clusterNodeSelector;
return this;
}
public Builder setDeploymentNodeSelector(final DeploymentNodeSelector deploymentNodeSelector) {
Assert.checkNotNullParam("deploymentNodeSelector", deploymentNodeSelector);
this.deploymentNodeSelector = deploymentNodeSelector;
return this;
}
public Builder setInvocationTimeout(final long invocationTimeout) {
Assert.checkMinimumParameter("invocationTimeout", 0L, invocationTimeout);
this.invocationTimeout = invocationTimeout;
return this;
}
public Builder setMaximumConnectedClusterNodes(final int maximumConnectedClusterNodes) {
Assert.checkMinimumParameter("maximumConnectedClusterNodes", 0, maximumConnectedClusterNodes);
this.maximumConnectedClusterNodes = maximumConnectedClusterNodes;
return this;
}
public void setDefaultCompression(int defaultCompression) {
Assert.checkMinimumParameter("defaultCompression", -1, defaultCompression);
Assert.checkMaximumParameter("defaultCompression", 9, defaultCompression);
this.defaultCompression = defaultCompression;
}
public EJBClientContext build() {
return new EJBClientContext(this);
}
}
/**
* Get the current client context for this thread.
*
* @return the current client context
*/
public static EJBClientContext getCurrent() {
final EJBClientContext clientContext = GETTER.get();
if (clientContext == null) {
throw Logs.MAIN.noEJBClientContextAvailable();
}
return clientContext;
}
/**
* Get the current client context for this thread. Delegates to {@link #getCurrent()}.
*
* @return the current client context for this thread
*/
public static EJBClientContext requireCurrent() {
return getCurrent();
}
StatefulEJBLocator createSession(final StatelessEJBLocator statelessLocator, final AuthenticationContext authenticationContext, final NamingProvider namingProvider) throws Exception {
EJBSessionCreationInvocationContext context = createSessionCreationInvocationContext(statelessLocator, authenticationContext);
return createSession(context, statelessLocator, namingProvider);
}
EJBSessionCreationInvocationContext createSessionCreationInvocationContext(StatelessEJBLocator statelessLocator, AuthenticationContext authenticationContext) {
EJBClientContext.InterceptorList interceptorList = getInterceptors(statelessLocator.getViewType());
return new EJBSessionCreationInvocationContext(statelessLocator, this, authenticationContext, interceptorList);
}
StatefulEJBLocator createSession(final EJBSessionCreationInvocationContext context, final StatelessEJBLocator statelessLocator, final NamingProvider namingProvider) throws Exception {
// Special hook for naming; let's replace this sometime soon.
if (namingProvider != null) context.putAttachment(Keys.NAMING_PROVIDER_ATTACHMENT_KEY, namingProvider);
if (Logs.INVOCATION.isDebugEnabled()) {
Logs.INVOCATION.debugf("Calling createSession(locator = %s)", statelessLocator);
}
SessionID sessionID = null;
for (int i = 0; i < MAX_SESSION_RETRIES; i++) {
Throwable t;
try {
sessionID = context.proceedInitial();
break;
} catch (RequestSendFailedException r) {
if (! r.canBeRetried()) {
throw r;
}
t = r;
} catch (Exception | Error o) {
if (! context.shouldRetry()) {
throw o;
}
t = o;
} catch (Throwable o) {
if (! context.shouldRetry()) {
Exception e = new RequestSendFailedException(o.getClass().getSimpleName() + ": " + o.getMessage(), o.getCause());
e.setStackTrace(o.getStackTrace());
throw e;
}
t = o;
}
if (i == MAX_SESSION_RETRIES - 1) {
throw new RequestSendFailedException(t.getMessage() + " (maximum retries exceeded)", t);
}
if (Logs.INVOCATION.isDebugEnabled()) {
Logs.INVOCATION.debugf("Retrying invocation (attempt %d): %s", i + 1, statelessLocator);
}
}
final Affinity affinity = context.getLocator().getAffinity();
if (Logs.INVOCATION.isDebugEnabled()) {
Logs.INVOCATION.debugf("Session created: session id: %s , affinity: %s", sessionID, affinity);
}
return statelessLocator.withSessionAndAffinity(sessionID, affinity);
}
InterceptorList getClassPathInterceptors() {
return classPathInterceptors;
}
InterceptorList getGlobalInterceptors() {
return globalInterceptors.combine(registeredInterceptors());
}
private InterceptorList registeredInterceptors() {
final EJBClientInterceptor.Registration[] currentRegistrations = this.registrations.clone();
ArrayList al = new ArrayList<>();
for (EJBClientInterceptor.Registration r: currentRegistrations) {
al.add(EJBClientInterceptorInformation.forInstance(r.getInterceptor()));
}
return InterceptorList.ofList(al);
}
Map getConfiguredPerClassInterceptors() {
return configuredPerClassInterceptors;
}
Map> getConfiguredPerMethodInterceptors() {
return configuredPerMethodInterceptors;
}
public int getDefaultCompression() {
return defaultCompression;
}
static T withSuppressed(T original, Collection suppressed) {
if (suppressed != null) {
for (Throwable throwable : suppressed) {
original.addSuppressed(throwable);
}
}
return original;
}
static T withSuppressed(T original, Collection suppressed1, Collection suppressed2) {
if (suppressed1 != null) {
for (Throwable throwable : suppressed1) {
original.addSuppressed(throwable);
}
}
if (suppressed2 != null) {
for (Throwable throwable : suppressed2) {
original.addSuppressed(throwable);
}
}
return original;
}
static final class InterceptorList {
static final InterceptorList EMPTY = new InterceptorList(EJBClientInterceptorInformation.NO_INTERCEPTORS);
private final EJBClientInterceptorInformation[] information;
private final int hashCode;
InterceptorList(final EJBClientInterceptorInformation[] information) {
Arrays.sort(information);
this.information = information;
hashCode = Arrays.hashCode(information);
}
EJBClientInterceptorInformation[] getInformation() {
return information;
}
public boolean equals(final Object obj) {
return obj instanceof InterceptorList && Arrays.equals(information, ((InterceptorList) obj).information);
}
public int hashCode() {
return hashCode;
}
private static InterceptorList ofList(final ArrayList value) {
if (value.isEmpty()) {
return EMPTY;
} else if (value.size() == 1) {
return value.get(0).getSingletonList();
} else {
return new InterceptorList(value.toArray(EJBClientInterceptorInformation.NO_INTERCEPTORS));
}
}
InterceptorList combine(final InterceptorList other) {
return information.length == 0 ? other : other.information.length == 0 ? this : new InterceptorList(concat(information, other.information));
}
private static EJBClientInterceptorInformation[] concat(final EJBClientInterceptorInformation[] a, final EJBClientInterceptorInformation[] b) {
final EJBClientInterceptorInformation[] c = Arrays.copyOf(a, a.length + b.length);
System.arraycopy(b, 0, c, a.length, b.length);
return c;
}
}
}
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