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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.protocol.remote;
import static java.security.AccessController.doPrivileged;
import static org.jboss.ejb.client.EJBClientContext.FILTER_ATTR_EJB_MODULE;
import static org.jboss.ejb.client.EJBClientContext.FILTER_ATTR_EJB_MODULE_DISTINCT;
import static org.jboss.ejb.client.EJBClientContext.FILTER_ATTR_NODE;
import static org.jboss.ejb.client.EJBClientContext.getCurrent;
import java.io.IOException;
import java.net.ConnectException;
import java.net.Inet6Address;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.UnknownHostException;
import java.security.GeneralSecurityException;
import java.security.PrivilegedAction;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import javax.net.ssl.SSLContext;
import org.jboss.ejb._private.Logs;
import org.jboss.ejb.client.DiscoveryEJBClientInterceptor;
import org.jboss.ejb.client.EJBClientConnection;
import org.jboss.ejb.client.EJBClientContext;
import org.jboss.ejb.client.EJBModuleIdentifier;
import org.jboss.logging.Logger;
import org.jboss.remoting3.ConnectionPeerIdentity;
import org.jboss.remoting3.Endpoint;
import org.wildfly.common.Assert;
import org.wildfly.common.net.CidrAddressTable;
import org.wildfly.common.net.Inet;
import org.wildfly.discovery.AllFilterSpec;
import org.wildfly.discovery.AttributeValue;
import org.wildfly.discovery.EqualsFilterSpec;
import org.wildfly.discovery.FilterSpec;
import org.wildfly.discovery.ServiceType;
import org.wildfly.discovery.ServiceURL;
import org.wildfly.discovery.spi.DiscoveryProvider;
import org.wildfly.discovery.spi.DiscoveryRequest;
import org.wildfly.discovery.spi.DiscoveryResult;
import org.wildfly.security.auth.client.AuthenticationConfiguration;
import org.wildfly.security.auth.client.AuthenticationContext;
import org.wildfly.security.auth.client.AuthenticationContextConfigurationClient;
import org.xnio.FailedIoFuture;
import org.xnio.IoFuture;
import org.xnio.OptionMap;
/**
* Provides discovery service based on all known EJBClientChannel service registry entries.
*
* @author David M. Lloyd
*/
final class RemotingEJBDiscoveryProvider implements DiscoveryProvider, DiscoveredNodeRegistry {
static final AuthenticationContextConfigurationClient AUTH_CONFIGURATION_CLIENT = doPrivileged(AuthenticationContextConfigurationClient.ACTION);
private final ConcurrentHashMap nodes = new ConcurrentHashMap<>();
private final ConcurrentHashMap failedDestinations = new ConcurrentHashMap();
private final ConcurrentHashMap> clusterNodes = new ConcurrentHashMap<>();
private final ConcurrentHashMap effectiveAuthURIs = new ConcurrentHashMap<>();
private static final long DESTINATION_RECHECK_INTERVAL = TimeUnit.MILLISECONDS.toNanos(SecurityUtils.getLong(SystemProperties.DESTINATION_RECHECK_INTERVAL, 5000L));
public RemotingEJBDiscoveryProvider() {
Endpoint.getCurrent(); //this will blow up if remoting is not present, preventing this from being registered
}
public NodeInformation getNodeInformation(final String nodeName) {
return nodes.computeIfAbsent(nodeName, NodeInformation::new);
}
public List getAllNodeInformation() {
return new ArrayList<>(nodes.values());
}
public void addNode(final String clusterName, final String nodeName, URI registeredBy) {
effectiveAuthURIs.putIfAbsent(clusterName, registeredBy);
clusterNodes.computeIfAbsent(clusterName, ignored -> Collections.newSetFromMap(new ConcurrentHashMap<>())).add(nodeName);
}
public void removeNode(final String clusterName, final String nodeName) {
clusterNodes.getOrDefault(clusterName, Collections.emptySet()).remove(nodeName);
}
public void removeCluster(final String clusterName) {
final Set removed = clusterNodes.remove(clusterName);
if (removed != null) removed.clear();
effectiveAuthURIs.remove(clusterName);
}
private boolean haveNotExpiredFailedDestination(URI uri) {
Long failureTimestamp = failedDestinations.get(uri);
if(failureTimestamp == null) {
return false;
}
else {
long delta = System.nanoTime() - failureTimestamp.longValue();
return delta < DESTINATION_RECHECK_INTERVAL;
}
}
public DiscoveryRequest discover(final ServiceType serviceType, final FilterSpec filterSpec, final DiscoveryResult result) {
if (! serviceType.implies(ServiceType.of("ejb", "jboss"))) {
// only respond to requests for JBoss Enterprise Beans services
Logs.INVOCATION.tracef("EJB discovery provider: wrong service type(%s), returning!", serviceType.toString());
result.complete();
return DiscoveryRequest.NULL;
}
final EJBClientContext ejbClientContext = getCurrent();
final RemoteEJBReceiver ejbReceiver = ejbClientContext.getAttachment(RemoteTransportProvider.ATTACHMENT_KEY);
if (ejbReceiver == null) {
// ???
Logs.INVOCATION.tracef("EJB discovery provider: no EJBReceiver available, returning!");
result.complete();
return DiscoveryRequest.NULL;
}
final List configuredConnections = ejbClientContext.getConfiguredConnections();
final DiscoveryAttempt discoveryAttempt = new DiscoveryAttempt(serviceType, filterSpec, result, ejbReceiver, AuthenticationContext.captureCurrent());
boolean ok = false;
boolean discoveryConnections = false;
// first pass
for (EJBClientConnection connection : configuredConnections) {
if (! connection.isForDiscovery()) {
Logs.INVOCATION.tracef("EJB discovery provider: found non-discovery connection, skipping");
continue;
}
discoveryConnections = true;
final URI uri = connection.getDestination();
if (haveNotExpiredFailedDestination(uri)) {
Logs.INVOCATION.tracef("EJB discovery provider: attempting to connect to configured connection %s, skipping because marked as failed", uri);
continue;
}
ok = true;
Logs.INVOCATION.tracef("EJB discovery provider: attempting to connect to configured connection %s", uri);
discoveryAttempt.connectAndDiscover(uri, null);
}
// also establish cluster nodes if known
for (Map.Entry> entry : clusterNodes.entrySet()) {
final String clusterName = entry.getKey();
final Set nodeSet = entry.getValue();
int maxConnections = ejbClientContext.getMaximumConnectedClusterNodes();
nodeLoop: for (String nodeName : nodeSet) {
if (maxConnections <= 0) break;
final NodeInformation nodeInformation = nodes.get(nodeName);
if (nodeInformation != null) {
final NodeInformation.ClusterNodeInformation clusterInfo = nodeInformation.getClustersByName().get(clusterName);
if (clusterInfo != null) {
final Map> tables = clusterInfo.getAddressTablesByProtocol();
for (Map.Entry> entry2 : tables.entrySet()) {
final String protocol = entry2.getKey();
final CidrAddressTable addressTable = entry2.getValue();
for (CidrAddressTable.Mapping mapping : addressTable) {
try {
final InetSocketAddress destination = Inet.getResolved(mapping.getValue());
final InetSocketAddress source = ejbReceiver.getSourceAddress(destination);
if (source == null ? mapping.getRange().getNetmaskBits() == 0 : source.equals(destination)) {
final InetAddress destinationAddress = destination.getAddress();
String hostName = Inet.getHostNameIfResolved(destinationAddress);
if (hostName == null) {
if (destinationAddress instanceof Inet6Address) {
hostName = '[' + Inet.toOptimalString(destinationAddress) + ']';
} else {
hostName = Inet.toOptimalString(destinationAddress);
}
}
final URI uri = new URI(protocol, null, hostName, destination.getPort(), null, null, null);
if (haveNotExpiredFailedDestination(uri)) {
Logs.INVOCATION.tracef("EJB discovery provider: attempting to connect to cluster connection %s, skipping because marked as failed", uri);
} else {
maxConnections--;
Logs.INVOCATION.tracef("EJB discovery provider: attempting to connect to cluster %s connection %s", clusterName, uri);
discoveryAttempt.connectAndDiscover(uri, clusterName);
ok = true;
continue nodeLoop;
}
}
} catch (URISyntaxException e) {
// ignore URI and try the next one
} catch (UnknownHostException e) {
Logs.MAIN.logf(Logger.Level.DEBUG, "Cannot resolve %s host during discovery attempt, skipping", mapping.getValue());
}
}
}
}
}
}
}
// special second pass - retry everything because all were marked failed
if (discoveryConnections && ! ok) {
Logs.INVOCATION.tracef("EJB discovery provider: all discovery-enabled configured connections marked failed, retrying configured connections ...");
for (EJBClientConnection connection : configuredConnections) {
if (! connection.isForDiscovery()) {
continue;
}
URI destination = connection.getDestination();
Logs.INVOCATION.tracef("EJB discovery provider: attempting to connect to connection %s", destination);
discoveryAttempt.connectAndDiscover(destination, null);
}
}
discoveryAttempt.countDown();
return discoveryAttempt;
}
static EJBModuleIdentifier getIdentifierForAttribute(String attribute, AttributeValue value) {
if (! value.isString()) {
return null;
}
final String stringVal = value.toString();
switch (attribute) {
case FILTER_ATTR_EJB_MODULE: {
final String[] segments = stringVal.split("/");
final String app, module;
if (segments.length == 2) {
app = segments[0];
module = segments[1];
} else if (segments.length == 1) {
app = "";
module = segments[0];
} else {
return null;
}
return new EJBModuleIdentifier(app, module, "");
}
case FILTER_ATTR_EJB_MODULE_DISTINCT: {
final String[] segments = stringVal.split("/");
final String app, module, distinct;
if (segments.length == 3) {
app = segments[0];
module = segments[1];
distinct = segments[2];
} else if (segments.length == 2) {
app = "";
module = segments[0];
distinct = segments[1];
} else {
return null;
}
return new EJBModuleIdentifier(app, module, distinct);
}
default: {
return null;
}
}
}
static final FilterSpec.Visitor MI_EXTRACTOR = new FilterSpec.Visitor() {
public EJBModuleIdentifier handle(final EqualsFilterSpec filterSpec, final Void parameter) throws RuntimeException {
return getIdentifierForAttribute(filterSpec.getAttribute(), filterSpec.getValue());
}
public EJBModuleIdentifier handle(final AllFilterSpec filterSpec, final Void parameter) throws RuntimeException {
for (FilterSpec child : filterSpec) {
final EJBModuleIdentifier match = child.accept(this);
if (match != null) {
return match;
}
}
return null;
}
};
static final FilterSpec.Visitor NODE_EXTRACTOR = new FilterSpec.Visitor() {
public String handle(final EqualsFilterSpec filterSpec, final Void parameter) throws RuntimeException {
final AttributeValue value = filterSpec.getValue();
return filterSpec.getAttribute().equals(FILTER_ATTR_NODE) && value.isString() ? value.toString() : null;
}
public String handle(final AllFilterSpec filterSpec, final Void parameter) throws RuntimeException {
for (FilterSpec child : filterSpec) {
final String match = child.accept(this);
if (match != null) {
return match;
}
}
return null;
}
};
/**
* This method gets a ConnectionPeerIdentity object for a remote connection to a destination, similar to Endpoint.getConnectedIdentity().
* However, if we call it with a cluster name, indicating that we are connecting to a cluster, instead of looking up the AuthenticationContext
* for the cluster member destination, it instead uses the AuthenticationContext for the URI which first connected to the cluster.
* This is the cluster effective URI, in the sense that it is an effective URI (i.e. resolved) for a cluster - the same credentials will be used
* no matter which cluster member we connect to.
*/
IoFuture getConnectedIdentityUsingClusterEffective(Endpoint endpoint, URI destination, String abstractType, String abstractTypeAuthority, AuthenticationContext context, String clusterName) {
Assert.checkNotNullParam("destination", destination);
Assert.checkNotNullParam("context", context);
URI effectiveAuth = clusterName != null ? effectiveAuthURIs.get(clusterName) : null;
boolean updateAuth = effectiveAuth != null;
if (!updateAuth) {
effectiveAuth = destination;
}
final AuthenticationContextConfigurationClient client = AUTH_CONFIGURATION_CLIENT;
final SSLContext sslContext;
try {
sslContext = client.getSSLContext(destination, context);
} catch (GeneralSecurityException e) {
return new FailedIoFuture<>(Logs.REMOTING.failedToConfigureSslContext(e));
}
final AuthenticationConfiguration authenticationConfiguration = client.getAuthenticationConfiguration(effectiveAuth, context, -1, abstractType, abstractTypeAuthority);
return endpoint.getConnectedIdentity(destination, sslContext, updateAuth ? fixupOverrides(authenticationConfiguration, destination) : authenticationConfiguration);
}
// TODO remove this hack once ELY-1399 is fully completed, and nothing else
// (e.g. naming) registers an override. This also works around REM3-315.
private AuthenticationConfiguration fixupOverrides(AuthenticationConfiguration config, URI target) {
return config.useProtocol(target.getScheme()).useHost(target.getHost()).usePort(target.getPort());
}
final class DiscoveryAttempt implements DiscoveryRequest, DiscoveryResult {
private final ServiceType serviceType;
private final FilterSpec filterSpec;
private final DiscoveryResult discoveryResult;
private final RemoteEJBReceiver ejbReceiver;
private final AuthenticationContext authenticationContext;
private final Endpoint endpoint;
private final AtomicInteger outstandingCount = new AtomicInteger(1); // this is '1' so that we don't finish until all connections are searched
private volatile boolean phase2;
private final List cancellers = Collections.synchronizedList(new ArrayList<>());
private final IoFuture.HandlingNotifier outerNotifier;
private final IoFuture.HandlingNotifier innerNotifier;
// keep a record of URIs we try to connect to for each cluster
private final ConcurrentHashMap> urisByCluster = new ConcurrentHashMap<>();
private final Set connectFailedURIs = new HashSet<>();
/**
* nodes that have already been provided to the discovery provider eagerly
*/
private final Set eagerNodes;
DiscoveryAttempt(final ServiceType serviceType, final FilterSpec filterSpec, final DiscoveryResult discoveryResult, final RemoteEJBReceiver ejbReceiver, final AuthenticationContext authenticationContext) {
this.serviceType = serviceType;
this.filterSpec = filterSpec;
this.discoveryResult = discoveryResult;
this.ejbReceiver = ejbReceiver;
this.authenticationContext = authenticationContext;
endpoint = Endpoint.getCurrent();
outerNotifier = new IoFuture.HandlingNotifier() {
public void handleCancelled(final URI destination) {
countDown();
}
public void handleFailed(final IOException exception, final URI destination) {
DiscoveryAttempt.this.discoveryResult.reportProblem(exception);
failedDestinations.put(destination, System.nanoTime());
if (exception instanceof ConnectException) {
connectFailedURIs.add(destination);
Logs.INVOCATION.tracef("DiscoveryAttempt: got ConnectException on node with destination = %s", destination);
}
countDown();
}
public void handleDone(final ConnectionPeerIdentity data, final URI destination) {
final IoFuture future = DiscoveryAttempt.this.ejbReceiver.serviceHandle.getClientService(data.getConnection(), OptionMap.EMPTY);
onCancel(future::cancel);
future.addNotifier(innerNotifier, destination);
}
};
innerNotifier = new IoFuture.HandlingNotifier() {
public void handleCancelled(final URI destination) {
countDown();
}
public void handleFailed(final IOException exception, final URI destination) {
DiscoveryAttempt.this.discoveryResult.reportProblem(exception);
failedDestinations.put(destination, System.nanoTime());
countDown();
}
public void handleDone(final EJBClientChannel clientChannel, final URI destination) {
failedDestinations.remove(destination);
countDown();
}
};
eagerNodes = DiscoveryEJBClientInterceptor.getDiscoveryAdditionalTimeout() == 0 ? null : Collections.synchronizedSet(new HashSet<>());
}
void connectAndDiscover(URI uri, String clusterEffective) {
final String scheme = uri.getScheme();
if (scheme == null || ! ejbReceiver.getRemoteTransportProvider().supportsProtocol(scheme) || ! endpoint.isValidUriScheme(scheme)) {
countDown();
return;
}
outstandingCount.getAndIncrement();
// keep a record of this URI if it has an associated cluster (EJBCLIENT-325)
if (clusterEffective != null) {
urisByCluster.computeIfAbsent(clusterEffective, ignored -> Collections.newSetFromMap(new ConcurrentHashMap<>())).add(uri);
}
final IoFuture future;
if(System.getSecurityManager() == null) {
future = getConnectedIdentityUsingClusterEffective(endpoint, uri, "ejb", "jboss", authenticationContext, clusterEffective);
} else {
future = doPrivileged((PrivilegedAction>) () -> getConnectedIdentityUsingClusterEffective(endpoint, uri, "ejb", "jboss", authenticationContext, clusterEffective));
}
onCancel(future::cancel);
future.addNotifier(outerNotifier, uri);
}
void countDown() {
if (outstandingCount.decrementAndGet() == 0) {
// before calculating the search result, update DNR to remove crashed last members of clusters (EJBCLIENT-325)
for (String cluster : urisByCluster.keySet()) {
Set uris = urisByCluster.get(cluster);
if (uris != null && uris.size() == 1) {
// get the URI and check if it represents a failed last cluster member
URI uri = uris.iterator().next();
if (connectFailedURIs.contains(uri)) {
Logs.INVOCATION.tracef("DiscoveryAttempt: countDown() found a cluster %s with one failed destination, %s, removing cluster", cluster, uri);
removeCluster(cluster);
for (NodeInformation nodeInformation : getAllNodeInformation()) {
nodeInformation.removeCluster(cluster);
}
}
}
}
final DiscoveryResult result = this.discoveryResult;
final String node = filterSpec.accept(NODE_EXTRACTOR);
final EJBModuleIdentifier module = filterSpec.accept(MI_EXTRACTOR);
if (phase2) {
if (node != null) {
if (eagerNodes == null || !eagerNodes.contains(node)) {
final NodeInformation information = nodes.get(node);
if (information != null) information.discover(serviceType, filterSpec, result);
}
} else for (NodeInformation information : nodes.values()) {
if (eagerNodes == null || !eagerNodes.contains(information.getNodeName())) {
information.discover(serviceType, filterSpec, result);
}
}
result.complete();
} else {
boolean ok = false;
// optimize for simple module identifier and node name queries
if (node != null) {
if (eagerNodes == null || !eagerNodes.contains(node)) {
final NodeInformation information = nodes.get(node);
if (information != null) {
if (information.discover(serviceType, filterSpec, result)) {
ok = true;
}
}
}
} else for (NodeInformation information : nodes.values()) {
if (eagerNodes == null || !eagerNodes.contains(information.getNodeName())) {
if (information.discover(serviceType, filterSpec, result)) {
ok = true;
}
}
}
if (ok || (eagerNodes != null && !eagerNodes.isEmpty())) {
result.complete();
} else {
// everything failed. We have to reconnect everything.
Set everything = new HashSet<>();
Map effectiveAuthMappings = new HashMap<>();
for (EJBClientConnection connection : ejbReceiver.getReceiverContext().getClientContext().getConfiguredConnections()) {
if (connection.isForDiscovery()) {
everything.add(connection.getDestination());
}
}
outer: for (NodeInformation information : nodes.values()) {
for (Map.Entry entry : information.getClustersByName().entrySet()) {
String clusterName = entry.getKey();
NodeInformation.ClusterNodeInformation cni = entry.getValue();
final Map> atm = cni.getAddressTablesByProtocol();
for (Map.Entry> entry2 : atm.entrySet()) {
final String protocol = entry2.getKey();
final CidrAddressTable addressTable = entry2.getValue();
for (CidrAddressTable.Mapping mapping : addressTable) {
try {
final InetSocketAddress destination = Inet.getResolved(mapping.getValue());
final InetSocketAddress source = ejbReceiver.getSourceAddress(destination);
if (source == null ? mapping.getRange().getNetmaskBits() == 0 : source.equals(destination)) {
final InetAddress destinationAddress = destination.getAddress();
String hostName = Inet.getHostNameIfResolved(destinationAddress);
if (hostName == null) {
if (destinationAddress instanceof Inet6Address) {
hostName = '[' + Inet.toOptimalString(destinationAddress) + ']';
} else {
hostName = Inet.toOptimalString(destinationAddress);
}
}
URI location = new URI(protocol, null, hostName, destination.getPort(), null, null, null);
effectiveAuthMappings.put(location, clusterName);
everything.add(location);
continue outer;
}
} catch (URISyntaxException | UnknownHostException e) {
// ignore URI and try the next one
}
}
}
}
}
// now connect them ALL
phase2 = true;
outstandingCount.incrementAndGet();
for (URI uri : everything) {
if(!failedDestinations.containsKey(uri)) {
connectAndDiscover(uri, effectiveAuthMappings.get(uri));
}
}
countDown();
}
}
} else if (eagerNodes != null) {
final DiscoveryResult result = this.discoveryResult;
final String node = filterSpec.accept(NODE_EXTRACTOR);
if (node != null) {
if (!eagerNodes.contains(node)) {
final NodeInformation information = nodes.get(node);
if (information != null) {
if (information.discover(serviceType, filterSpec, result)) {
eagerNodes.add(node);
}
}
}
} else for (NodeInformation information : nodes.values()) {
if (!eagerNodes.contains(information.getNodeName())) {
if (information.discover(serviceType, filterSpec, result)) {
eagerNodes.add(information.getNodeName());
}
}
}
}
}
// discovery result methods
public void complete() {
countDown();
}
public void reportProblem(final Throwable description) {
discoveryResult.reportProblem(description);
}
public void addMatch(final ServiceURL serviceURL) {
discoveryResult.addMatch(serviceURL);
}
// discovery request methods
public void cancel() {
final List cancellers = this.cancellers;
final List cancellersCopy;
synchronized (cancellers) {
/*
In scenario in which the last node performs a cancel operation and discovery fails a retry is
attempted (see phase2 in countdown method above). This triggers opening new connections and,
as a result, adding cancellers, which are being iterated over in this method leading to
ConcurrentModificationException. To avoid this the copy is created.
See https://issues.redhat.com/browse/JBEAP-24568
*/
cancellersCopy = new ArrayList<>(cancellers);
}
/*
* EJBCLIENT-536 - since we are iterating the copy we can safely do it outside synchronized block; running
* the cancellers synchronized may cause deadlocks
*/
for (Runnable canceller : cancellersCopy) {
canceller.run();
}
}
void onCancel(final Runnable action) {
final List cancellers = this.cancellers;
synchronized (cancellers) {
cancellers.add(action);
}
}
}
}
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