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Diffstat (limited to 'utils/src/main/java/org/onap/policy/common/utils/services/OrderedService.java')
-rw-r--r-- | utils/src/main/java/org/onap/policy/common/utils/services/OrderedService.java | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/utils/src/main/java/org/onap/policy/common/utils/services/OrderedService.java b/utils/src/main/java/org/onap/policy/common/utils/services/OrderedService.java new file mode 100644 index 00000000..c5050c83 --- /dev/null +++ b/utils/src/main/java/org/onap/policy/common/utils/services/OrderedService.java @@ -0,0 +1,47 @@ +/* + * ============LICENSE_START======================================================= + * utils + * ================================================================================ + * Copyright (C) 2019 AT&T Intellectual Property. All rights reserved. + * ================================================================================ + * 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. + * ============LICENSE_END========================================================= + */ + +package org.onap.policy.common.utils.services; + +/** + * This is a base interface that is used to control the order of a list + * of services (features) discovered via 'ServiceLoader'. See + * 'OrderedServiceImpl' for more details. + */ +@FunctionalInterface +public interface OrderedService { + /** + * Get sequence number. + * + * @return an integer sequence number, which determines the order of a list + * of objects implementing this interface + */ + public int getSequenceNumber(); + + + /** + * Get the name. + * + * @return the name of the ordered service + */ + public default String getName() { + return this.getClass().getName(); + } +} |