com.sap.cds.feature.messaging.mq.client.MessageQueuingManagementClient Maven / Gradle / Ivy

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Message Queuing feature for CDS Services Java
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/**************************************************************************
 * (C) 2019-2024 SAP SE or an SAP affiliate company. All rights reserved. *
 **************************************************************************/
package com.sap.cds.feature.messaging.mq.client;

import java.io.IOException;
import java.net.URI;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.util.Map;

import org.apache.http.HttpStatus;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.node.ObjectNode;
import com.sap.cds.integration.cloudsdk.rest.client.JsonRestClient;
import com.sap.cds.integration.cloudsdk.rest.client.JsonRestClientResponseException;
import com.sap.cloud.environment.servicebinding.api.ServiceBinding;
import com.sap.cloud.environment.servicebinding.api.ServiceIdentifier;
import com.sap.cloud.sdk.cloudplatform.connectivity.DefaultOAuth2PropertySupplier;
import com.sap.cloud.sdk.cloudplatform.connectivity.OAuth2ServiceBindingDestinationLoader;
import com.sap.cloud.sdk.cloudplatform.connectivity.OnBehalfOf;
import com.sap.cloud.sdk.cloudplatform.connectivity.ServiceBindingDestinationOptions;

/**
 * Implementation of the enterprise messaging management API.
 */
public class MessageQueuingManagementClient extends JsonRestClient {

	private static final String API_BASE = "/v1/management";
	private static final String API_QUEUE = API_BASE + "/queues/%s";
	private static final String API_SUBSCRIBE = API_BASE + "/queues/%s/subscriptions/topics/%s";

	static {
		OAuth2ServiceBindingDestinationLoader.registerPropertySupplier(
				ServiceIdentifier.of("message-queuing"),
				OAuth2Supplier::new);
	}

	private static class OAuth2Supplier extends DefaultOAuth2PropertySupplier {

		public OAuth2Supplier(ServiceBindingDestinationOptions options) {
			super(options);
		}

		@Override
		public URI getServiceUri() {
			return getCredentialOrThrow(URI.class, "management", "url");
		}

	}

	public MessageQueuingManagementClient(ServiceBinding binding) {
		super(ServiceBindingDestinationOptions.forService(binding).onBehalfOf(OnBehalfOf.TECHNICAL_USER_PROVIDER).build());
	}

	public void removeQueue(String name) throws IOException {
		String encName = URLEncoder.encode(name, StandardCharsets.UTF_8.toString());
		deleteRequest(API_QUEUE.formatted(encName));
	}


	public JsonNode getQueue(String name) throws IOException {

		try {
			String encName = URLEncoder.encode(name, StandardCharsets.UTF_8.toString());
			return getRequest(API_QUEUE.formatted(encName));
		} catch (JsonRestClientResponseException e) {
			if (e.getResponseCode() == HttpStatus.SC_NOT_FOUND) {
				return null;
			}
			throw e;
		}
	}

	public void createQueue(String name, Map properties) throws IOException {
		ObjectNode data = mapper.convertValue(properties, ObjectNode.class);
		String encName = URLEncoder.encode(name, StandardCharsets.UTF_8.toString());
		putRequest(API_QUEUE.formatted(encName), data);
	}

	public void createQueueSubscription(String queue, String topic) throws IOException {
		String encQueue = URLEncoder.encode(queue, StandardCharsets.UTF_8.toString());
		String encTopic = URLEncoder.encode(topic, StandardCharsets.UTF_8.toString());
		putRequest(API_SUBSCRIBE.formatted(encQueue, encTopic), null);
	}
}