org.wildfly.httpclient.ejb.HttpEJBDiscoveryProvider Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
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/*
* JBoss, Home of Professional Open Source.
* Copyright 2020 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.wildfly.httpclient.ejb;
import io.undertow.client.ClientRequest;
import io.undertow.util.Headers;
import io.undertow.util.Methods;
import org.jboss.ejb.client.EJBClientConnection;
import org.jboss.ejb.client.EJBClientContext;
import org.jboss.ejb.client.EJBModuleIdentifier;
import org.jboss.marshalling.InputStreamByteInput;
import org.jboss.marshalling.Unmarshaller;
import org.wildfly.discovery.AttributeValue;
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.httpclient.common.HttpTargetContext;
import org.wildfly.httpclient.common.WildflyHttpContext;
import org.wildfly.security.auth.client.AuthenticationConfiguration;
import org.wildfly.security.auth.client.AuthenticationContext;
import org.wildfly.security.auth.client.AuthenticationContextConfigurationClient;
import org.wildfly.security.manager.WildFlySecurityManager;
import org.xnio.IoUtils;
import javax.net.ssl.SSLContext;
import java.net.URI;
import java.security.GeneralSecurityException;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.stream.Collectors;
import static java.security.AccessController.doPrivileged;
import static org.jboss.ejb.client.EJBClientContext.getCurrent;
import static org.wildfly.httpclient.common.Protocol.VERSION_PATH;
import static org.wildfly.httpclient.ejb.EjbConstants.DISCOVERY_PATH_PREFIX;
import static org.wildfly.httpclient.ejb.EjbConstants.EJB_DISCOVERY_RESPONSE;
import static org.wildfly.httpclient.ejb.EjbConstants.EJB_DISCOVER_PATH;
import static org.wildfly.httpclient.ejb.EjbConstants.EJB_EXCEPTION;
import static org.wildfly.httpclient.ejb.EjbConstants.HTTPS_SCHEME;
import static org.wildfly.httpclient.ejb.EjbConstants.HTTP_SCHEME;
/**
* @author Tomasz Adamski
*/
public final class HttpEJBDiscoveryProvider implements DiscoveryProvider {
private static final AuthenticationContextConfigurationClient AUTH_CONFIGURATION_CLIENT = doPrivileged(AuthenticationContextConfigurationClient.ACTION);
private static final long CACHE_REFRESH_TIMEOUT = TimeUnit.MILLISECONDS.toNanos(Long.parseLong(
WildFlySecurityManager.getPropertyPrivileged("org.wildfly.httpclient.ejb.discovery.cache-refresh-timeout", "300000")));
private Set serviceURLCache = new HashSet<>();
private AtomicBoolean cacheInvalid = new AtomicBoolean(true);
private long cacheRefreshTimestamp = 0L;
HttpEJBDiscoveryProvider() {
}
public DiscoveryRequest discover(final ServiceType serviceType, final FilterSpec filterSpec, final DiscoveryResult discoveryResult) {
final EJBClientContext ejbClientContext = getCurrent();
if (shouldRefreshCache()) {
refreshCache(ejbClientContext);
}
searchCache(discoveryResult, filterSpec, ejbClientContext);
return DiscoveryRequest.NULL;
}
private boolean shouldRefreshCache() {
if (cacheInvalid.get() || ((System.nanoTime() - cacheRefreshTimestamp) > CACHE_REFRESH_TIMEOUT)) {
return true;
}
return false;
}
private boolean supportsScheme(String s) {
switch (s) {
case HTTP_SCHEME:
case HTTPS_SCHEME:
return true;
}
return false;
}
private void searchCache(final DiscoveryResult discoveryResult, final FilterSpec filterSpec, final EJBClientContext ejbClientContext) {
final boolean resultsPresent = doSearchCache(discoveryResult, filterSpec);
if(!resultsPresent){
refreshCache(ejbClientContext);
}
discoveryResult.complete();
}
private boolean doSearchCache(final DiscoveryResult discoveryResult, final FilterSpec filterSpec) {
boolean resultsPresent = false;
for (ServiceURL serviceURL : serviceURLCache) {
if (serviceURL.satisfies(filterSpec)) {
discoveryResult.addMatch(serviceURL.getLocationURI());
resultsPresent = true;
}
}
return resultsPresent;
}
private void refreshCache(final EJBClientContext ejbClientContext){
serviceURLCache.clear();
final List httpConnections = ejbClientContext.getConfiguredConnections().stream().filter(
(connection) -> supportsScheme(connection.getDestination().getScheme())
).collect(Collectors.toList());
final CountDownLatch outstandingLatch = new CountDownLatch(httpConnections.size());
for (EJBClientConnection connection : httpConnections) {
discoverFromConnection(connection, outstandingLatch);
}
try {
outstandingLatch.await();
cacheInvalid.set(false);
cacheRefreshTimestamp = System.nanoTime();
} catch(InterruptedException e){
EjbHttpClientMessages.MESSAGES.httpDiscoveryInterrupted(e);
}
cacheInvalid.set(false);
}
private void discoverFromConnection(final EJBClientConnection connection, final CountDownLatch outstandingLatch) {
final URI newUri = connection.getDestination();
HttpTargetContext targetContext = WildflyHttpContext.getCurrent().getTargetContext(newUri);
AuthenticationContext authenticationContext = AuthenticationContext.captureCurrent();
final AuthenticationContextConfigurationClient client = AUTH_CONFIGURATION_CLIENT;
final SSLContext sslContext;
try {
sslContext = client.getSSLContext(newUri, authenticationContext);
} catch (GeneralSecurityException e) {
return;
}
final AuthenticationConfiguration authenticationConfiguration = client.getAuthenticationConfiguration(newUri, authenticationContext, -1, "ejb", "jboss");
ClientRequest request = new ClientRequest()
.setPath(targetContext.getUri().getPath() + DISCOVERY_PATH_PREFIX + VERSION_PATH +
targetContext.getProtocolVersion() + EJB_DISCOVER_PATH)
.setMethod(Methods.GET);
request.getRequestHeaders().add(Headers.ACCEPT, EJB_DISCOVERY_RESPONSE + "," + EJB_EXCEPTION);
targetContext.sendRequest(request, sslContext, authenticationConfiguration, null,
((result, response, closeable) -> {
try {
final Unmarshaller unmarshaller = targetContext.getHttpMarshallerFactory(request).createUnmarshaller();
unmarshaller.start(new InputStreamByteInput(result));
int size = unmarshaller.readInt();
for (int i = 0; i < size; i++) {
EJBModuleIdentifier ejbModuleIdentifier = (EJBModuleIdentifier) unmarshaller.readObject();
ServiceURL url = createServiceURL(newUri, ejbModuleIdentifier);
serviceURLCache.add(url);
}
} catch (Exception e) {
EjbHttpClientMessages.MESSAGES.unableToPerformEjbDiscovery(e);
} finally {
outstandingLatch.countDown();
IoUtils.safeClose(closeable);
}
}),
(e) -> {
EjbHttpClientMessages.MESSAGES.unableToPerformEjbDiscovery(e);
outstandingLatch.countDown();
},
EjbConstants.EJB_DISCOVERY_RESPONSE, null);
}
private ServiceURL createServiceURL(final URI newUri, final EJBModuleIdentifier moduleIdentifier) {
final ServiceURL.Builder builder = new ServiceURL.Builder();
builder.setUri(newUri);
builder.setAbstractType(EJBClientContext.EJB_SERVICE_TYPE.getAbstractType());
builder.setAbstractTypeAuthority(EJBClientContext.EJB_SERVICE_TYPE.getAbstractTypeAuthority());
final String appName = moduleIdentifier.getAppName();
final String moduleName = moduleIdentifier.getModuleName();
final String distinctName = moduleIdentifier.getDistinctName();
if (distinctName.isEmpty()) {
if (appName.isEmpty()) {
builder.addAttribute(EJBClientContext.FILTER_ATTR_EJB_MODULE, AttributeValue.fromString(moduleName));
} else {
builder.addAttribute(EJBClientContext.FILTER_ATTR_EJB_MODULE, AttributeValue.fromString(appName + "/" + moduleName));
}
} else {
if (appName.isEmpty()) {
builder.addAttribute(EJBClientContext.FILTER_ATTR_EJB_MODULE_DISTINCT, AttributeValue.fromString(moduleName + "/" + distinctName));
} else {
builder.addAttribute(EJBClientContext.FILTER_ATTR_EJB_MODULE_DISTINCT, AttributeValue.fromString(appName + "/" + moduleName + "/" + distinctName));
}
}
return builder.create();
}
@Override
public void processMissingTarget(URI location, Exception cause) {
cacheInvalid.set(true);
}
}