PathDestinationFactory.java

/*
 * Copyright 2015-present the original author or authors.
 *
 * 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
 *
 *      https://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.springframework.cloud.bus.event;

import org.springframework.util.StringUtils;

public class PathDestinationFactory implements Destination.Factory {

	public Destination getDestination(String originalDestination) {
		String path = originalDestination;
		if (path == null) {
			path = "**";
		}
		// If the path is not already a wildcard, match everything that
		// follows if there at most two path elements, and last element is not a global
		// wildcard already
		if (!"**".equals(path)) {
			if (StringUtils.countOccurrencesOf(path, ":") <= 1 && !StringUtils.endsWithIgnoreCase(path, ":**")) {
				// All instances of the destination unless specifically requested
				path = path + ":**";
			}
		}

		final String finalPath = path;
		return () -> finalPath;
	}

}