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Libraries built on Microsoft Azure Service Bus
// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.
package com.azure.messaging.servicebus.implementation;
import com.azure.core.amqp.AmqpRetryOptions;
import com.azure.core.amqp.AmqpRetryPolicy;
import com.azure.core.amqp.AmqpSession;
import com.azure.core.amqp.implementation.AmqpSendLink;
import com.azure.core.amqp.implementation.AzureTokenManagerProvider;
import com.azure.core.amqp.implementation.CbsAuthorizationType;
import com.azure.core.amqp.implementation.ConnectionOptions;
import com.azure.core.amqp.implementation.MessageSerializer;
import com.azure.core.amqp.implementation.ReactorConnection;
import com.azure.core.amqp.implementation.ReactorHandlerProvider;
import com.azure.core.amqp.implementation.ReactorProvider;
import com.azure.core.amqp.implementation.RetryUtil;
import com.azure.core.amqp.implementation.TokenManager;
import com.azure.core.amqp.implementation.TokenManagerProvider;
import com.azure.core.amqp.implementation.handler.SessionHandler;
import com.azure.core.util.logging.ClientLogger;
import com.azure.messaging.servicebus.models.ServiceBusReceiveMode;
import org.apache.qpid.proton.amqp.transport.ReceiverSettleMode;
import org.apache.qpid.proton.amqp.transport.SenderSettleMode;
import org.apache.qpid.proton.engine.BaseHandler;
import org.apache.qpid.proton.engine.Session;
import reactor.core.publisher.Mono;
import reactor.core.scheduler.Scheduler;
import java.util.concurrent.ConcurrentHashMap;
/**
* A proton-j AMQP connection to an Azure Service Bus instance.
*/
public class ServiceBusReactorAmqpConnection extends ReactorConnection implements ServiceBusAmqpConnection {
private static final String MANAGEMENT_SESSION_NAME = "mgmt-session";
private static final String MANAGEMENT_LINK_NAME = "mgmt";
private static final String MANAGEMENT_ADDRESS = "$management";
private static final String CROSS_ENTITY_TRANSACTIONS_LINK_NAME = "crossentity-coordinator";
private final ClientLogger logger = new ClientLogger(ServiceBusReactorAmqpConnection.class);
/**
* Keeps track of the opened send links. Links are key'd by their entityPath. The send link for allowing the service
* load balance messages is the eventHubName.
*/
private final ConcurrentHashMap sendLinks = new ConcurrentHashMap<>();
private final ConcurrentHashMap managementNodes = new ConcurrentHashMap<>();
private final String connectionId;
private final ReactorProvider reactorProvider;
private final ReactorHandlerProvider handlerProvider;
private final TokenManagerProvider tokenManagerProvider;
private final AmqpRetryOptions retryOptions;
private final MessageSerializer messageSerializer;
private final Scheduler scheduler;
private final String fullyQualifiedNamespace;
private final CbsAuthorizationType authorizationType;
private final boolean distributedTransactionsSupport;
/**
* Creates a new AMQP connection that uses proton-j.
*
* @param connectionId Identifier for the connection.
* @param connectionOptions A set of options used to create the AMQP connection.
* @param reactorProvider Provides proton-j reactor instances.
* @param handlerProvider Provides {@link BaseHandler} to listen to proton-j reactor events.
* @param tokenManagerProvider Provides a token manager for authorizing with CBS node.
* @param messageSerializer Serializes and deserializes proton-j messages.
* @param distributedTransactionsSupport indicate if distributed transaction across different entities is required
* for this connection.
*/
public ServiceBusReactorAmqpConnection(String connectionId, ConnectionOptions connectionOptions,
ReactorProvider reactorProvider, ReactorHandlerProvider handlerProvider,
TokenManagerProvider tokenManagerProvider, MessageSerializer messageSerializer,
boolean distributedTransactionsSupport) {
super(connectionId, connectionOptions, reactorProvider, handlerProvider, tokenManagerProvider,
messageSerializer, SenderSettleMode.SETTLED, ReceiverSettleMode.FIRST);
this.connectionId = connectionId;
this.reactorProvider = reactorProvider;
this.handlerProvider = handlerProvider;
this.tokenManagerProvider = tokenManagerProvider;
this.authorizationType = connectionOptions.getAuthorizationType();
this.retryOptions = connectionOptions.getRetry();
this.messageSerializer = messageSerializer;
this.scheduler = connectionOptions.getScheduler();
this.fullyQualifiedNamespace = connectionOptions.getFullyQualifiedNamespace();
this.distributedTransactionsSupport = distributedTransactionsSupport;
}
@Override
public Mono getManagementNode(String entityPath, MessagingEntityType entityType) {
if (isDisposed()) {
return Mono.error(logger.logExceptionAsError(new IllegalStateException(String.format(
"connectionId[%s]: Connection is disposed. Cannot get management instance for '%s'",
connectionId, entityPath))));
}
final String entityTypePath = String.join("-", entityType.toString(), entityPath);
final ServiceBusManagementNode existing = managementNodes.get(entityTypePath);
if (existing != null) {
return Mono.just(existing);
}
return getReactorConnection().then(
Mono.defer(() -> {
final TokenManager tokenManager = new AzureTokenManagerProvider(authorizationType,
fullyQualifiedNamespace, ServiceBusConstants.AZURE_ACTIVE_DIRECTORY_SCOPE)
.getTokenManager(getClaimsBasedSecurityNode(), entityPath);
return tokenManager.authorize().thenReturn(managementNodes.compute(entityTypePath, (key, current) -> {
if (current != null) {
logger.info("A management node exists already, returning it.");
// Close the token manager we had created during this because it is unneeded now.
tokenManager.close();
return current;
}
final String sessionName = entityPath + "-" + MANAGEMENT_SESSION_NAME;
final String linkName = entityPath + "-" + MANAGEMENT_LINK_NAME;
final String address = entityPath + "/" + MANAGEMENT_ADDRESS;
logger.info("Creating management node. entityPath: [{}]. address: [{}]. linkName: [{}]",
entityPath, address, linkName);
return new ManagementChannel(createRequestResponseChannel(sessionName, linkName, address),
fullyQualifiedNamespace, entityPath, tokenManager, messageSerializer,
retryOptions.getTryTimeout());
}));
}));
}
/**
* Creates or gets a send link. The same link is returned if there is an existing send link with the same {@code
* linkName}. Otherwise, a new link is created and returned.
*
* @param linkName The name of the link.
* @param entityPath The remote address to connect to for the message broker.
* @param retryOptions Options to use when creating the link.
* @param transferEntityPath Path if the message should be transferred this destination by message broker.
*
* @return A new or existing send link that is connected to the given {@code entityPath}.
*/
@Override
public Mono createSendLink(String linkName, String entityPath, AmqpRetryOptions retryOptions,
String transferEntityPath) {
return createSession(linkName).cast(ServiceBusSession.class).flatMap(session -> {
logger.verbose("Get or create sender link : '{}'", linkName);
final AmqpRetryPolicy retryPolicy = RetryUtil.getRetryPolicy(retryOptions);
return session.createProducer(linkName + entityPath, entityPath, retryOptions.getTryTimeout(),
retryPolicy, transferEntityPath).cast(AmqpSendLink.class);
});
}
/**
* Creates or gets an existing receive link. The same link is returned if there is an existing receive link with the
* same {@code linkName}. Otherwise, a new link is created and returned.
*
* @param linkName The name of the link.
* @param entityPath The remote address to connect to for the message broker.
* @param receiveMode Consumer options to use when creating the link.
* @param transferEntityPath Path if the events should be transferred to another link after being received
* from this link.
* @param entityType {@link MessagingEntityType} to use when creating the link.
*
* @return A new or existing receive link that is connected to the given {@code entityPath}.
*/
@Override
public Mono createReceiveLink(String linkName, String entityPath,
ServiceBusReceiveMode receiveMode, String transferEntityPath, MessagingEntityType entityType) {
return createSession(entityPath).cast(ServiceBusSession.class)
.flatMap(session -> {
logger.verbose("Get or create consumer for path: '{}'", entityPath);
final AmqpRetryPolicy retryPolicy = RetryUtil.getRetryPolicy(retryOptions);
return session.createConsumer(linkName, entityPath, entityType, retryOptions.getTryTimeout(),
retryPolicy, receiveMode);
});
}
@Override
public Mono createSession(String sessionName) {
return super.createSession(distributedTransactionsSupport ? CROSS_ENTITY_TRANSACTIONS_LINK_NAME : sessionName);
}
/**
* Creates or gets an existing receive link. The same link is returned if there is an existing receive link with the
* same {@code linkName}. Otherwise, a new link is created and returned.
*
* @param linkName The name of the link.
* @param entityPath The remote address to connect to for the message broker.
* @param receiveMode Consumer options to use when creating the link.
* @param transferEntityPath to use when creating the link.
* @param entityType {@link MessagingEntityType} to use when creating the link.
* @param sessionId to use when creating the link.
*
* @return A new or existing receive link that is connected to the given {@code entityPath}.
*/
@Override
public Mono createReceiveLink(String linkName, String entityPath,
ServiceBusReceiveMode receiveMode, String transferEntityPath, MessagingEntityType entityType,
String sessionId) {
return createSession(entityPath).cast(ServiceBusSession.class)
.flatMap(session -> {
logger.verbose("Get or create consumer for path: '{}'", entityPath);
final AmqpRetryPolicy retryPolicy = RetryUtil.getRetryPolicy(retryOptions);
return session.createConsumer(linkName, entityPath, entityType, retryOptions.getTryTimeout(),
retryPolicy, receiveMode, sessionId);
});
}
@Override
public void dispose() {
logger.verbose("Disposing of connection.");
sendLinks.forEach((key, value) -> value.dispose());
sendLinks.clear();
super.dispose();
}
@Override
protected AmqpSession createSession(String sessionName, Session session, SessionHandler handler) {
return new ServiceBusReactorSession(session, handler, sessionName, reactorProvider, handlerProvider,
getClaimsBasedSecurityNode(), tokenManagerProvider, messageSerializer, retryOptions,
new ServiceBusCreateSessionOptions(distributedTransactionsSupport));
}
}