| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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.apache.skywalking.oap.server.core.analysis; |
| |
| import java.lang.annotation.ElementType; |
| import java.lang.annotation.Retention; |
| import java.lang.annotation.RetentionPolicy; |
| import java.lang.annotation.Target; |
| import org.apache.skywalking.oap.server.core.analysis.worker.MetricsStreamProcessor; |
| import org.apache.skywalking.oap.server.core.analysis.worker.NoneStreamProcessor; |
| import org.apache.skywalking.oap.server.core.analysis.worker.RecordStreamProcessor; |
| import org.apache.skywalking.oap.server.core.analysis.worker.TopNStreamProcessor; |
| import org.apache.skywalking.oap.server.core.source.ScopeDeclaration; |
| import org.apache.skywalking.oap.server.core.storage.type.StorageBuilder; |
| |
| /** |
| * Stream annotation represents a metadata definition. Include the key values of the distributed streaming calculation. |
| * See {@link MetricsStreamProcessor}, {@link RecordStreamProcessor}, {@link TopNStreamProcessor} and {@link |
| * NoneStreamProcessor} for more details. |
| */ |
| @Target(ElementType.TYPE) |
| @Retention(RetentionPolicy.RUNTIME) |
| public @interface Stream { |
| /** |
| * @return name of this stream definition. |
| */ |
| String name(); |
| |
| /** |
| * @return scope id, see {@link ScopeDeclaration} |
| */ |
| int scopeId(); |
| |
| /** |
| * @return the converter type between entity and storage record persistence. The converter could be override by the |
| * storage implementation if necessary. Default, return {@link org.apache.skywalking.oap.server.core.storage.type.StorageBuilder} |
| * for general suitable. |
| */ |
| Class<? extends StorageBuilder> builder(); |
| |
| /** |
| * @return the stream processor type, see {@link MetricsStreamProcessor}, {@link RecordStreamProcessor}, {@link |
| * TopNStreamProcessor} and {@link NoneStreamProcessor} for more details. |
| */ |
| Class<? extends StreamProcessor> processor(); |
| } |