/*
* Copyright 2016 Red Hat, Inc. and/or its affiliates
* and other 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.keycloak.adapters;
import org.jboss.logging.Logger;
import org.keycloak.common.util.HostUtils;
import org.keycloak.common.util.Time;
import java.io.IOException;
import java.util.Collection;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.Executor;
import java.util.concurrent.Executors;
/**
* @author <a href="mailto:mposolda@redhat.com">Marek Posolda</a>
*/
public class NodesRegistrationManagement {
private static final Logger log = Logger.getLogger(NodesRegistrationManagement.class);
private final Map<String, NodeRegistrationContext> nodeRegistrations = new ConcurrentHashMap<String, NodeRegistrationContext>();
private final Executor executor = Executors.newSingleThreadExecutor();
// Sending registration event during first request to application or if re-registration is needed
public void tryRegister(final KeycloakDeployment resolvedDeployment) {
if (resolvedDeployment.isRegisterNodeAtStartup()) {
final String registrationUri = resolvedDeployment.getRegisterNodeUrl();
if (needRefreshRegistration(registrationUri, resolvedDeployment)) {
Runnable runnable = new Runnable() {
@Override
public void run() {
// Need to check it again in case that executor triggered by other thread already finished computation in the meantime
if (needRefreshRegistration(registrationUri, resolvedDeployment)) {
sendRegistrationEvent(resolvedDeployment);
}
}
};
executor.execute(runnable);
}
}
}
private boolean needRefreshRegistration(String registrationUri, KeycloakDeployment resolvedDeployment) {
NodeRegistrationContext currentRegistration = nodeRegistrations.get(registrationUri);
/// We don't yet have any registration for this node
if (currentRegistration == null) {
return true;
}
return currentRegistration.lastRegistrationTime + resolvedDeployment.getRegisterNodePeriod() < Time.currentTime();
}
/**
* Called during undeployment or server stop. De-register from all previously registered deployments
*/
public void stop() {
Collection<NodeRegistrationContext> allRegistrations = nodeRegistrations.values();
for (NodeRegistrationContext registration : allRegistrations) {
sendUnregistrationEvent(registration.resolvedDeployment);
}
}
protected void sendRegistrationEvent(KeycloakDeployment deployment) {
log.debug("Sending registration event right now");
String host = HostUtils.getHostName();
try {
ServerRequest.invokeRegisterNode(deployment, host);
NodeRegistrationContext regContext = new NodeRegistrationContext(Time.currentTime(), deployment);
nodeRegistrations.put(deployment.getRegisterNodeUrl(), regContext);
log.debugf("Node '%s' successfully registered in Keycloak", host);
} catch (ServerRequest.HttpFailure failure) {
log.error("failed to register node to keycloak");
log.error("status from server: " + failure.getStatus());
if (failure.getError() != null) {
log.error(" " + failure.getError());
}
} catch (IOException e) {
log.error("failed to register node to keycloak", e);
}
}
protected boolean sendUnregistrationEvent(KeycloakDeployment deployment) {
log.debug("Sending Unregistration event right now");
String host = HostUtils.getHostName();
try {
ServerRequest.invokeUnregisterNode(deployment, host);
log.debugf("Node '%s' successfully unregistered from Keycloak", host);
return true;
} catch (ServerRequest.HttpFailure failure) {
log.error("failed to unregister node from keycloak");
log.error("status from server: " + failure.getStatus());
if (failure.getError() != null) {
log.error(" " + failure.getError());
}
return false;
} catch (IOException e) {
log.error("failed to unregister node from keycloak", e);
return false;
}
}
public static class NodeRegistrationContext {
private final Integer lastRegistrationTime;
// deployment instance used for registration request
private final KeycloakDeployment resolvedDeployment;
public NodeRegistrationContext(Integer lastRegTime, KeycloakDeployment deployment) {
this.lastRegistrationTime = lastRegTime;
this.resolvedDeployment = deployment;
}
}
}