mirror of https://github.com/apache/cloudstack.git
67 lines
1.7 KiB
Java
67 lines
1.7 KiB
Java
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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package streamer;
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/**
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* Link is wire between two elements. It always must contain source and sink
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* elements.
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*/
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public interface Link extends DataSource, DataSink, Runnable {
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/**
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* Wire this link with given sink.
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*
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* @param sink
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* an Element
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* @return same sink element, for chaining
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*/
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Element setSink(Element sink);
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/**
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* Wire this link with given source.
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*
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* @param source
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* an Element
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* @return same source element, for chaining
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*/
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Element setSource(Element source);
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Element getSource();
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Element getSink();
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/**
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* Hold all data in cache, don't pass data to sink until resumed.
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*/
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void pause();
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/**
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* Resume transfer.
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*/
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void resume();
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/**
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* Change mode of operation of this link from push mode to pull mode.
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*/
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void setPullMode();
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/**
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* Drop this link.
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*/
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void drop();
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}
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