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@cschneider
Last active January 5, 2019 11:34
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/*
* 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 SF 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.aries.events.api;
import static java.util.Objects.requireNonNull;
import java.util.function.Consumer;
import javax.annotation.ParametersAreNonnullByDefault;
@ParametersAreNonnullByDefault
public final class SubscribeRequestBuilder {
private SubscribeRequest subscribeRequest;
private SubscribeRequestBuilder(SubscribeRequest subscribeRequest) {
this.subscribeRequest = subscribeRequest;
}
public static SubscribeRequestBuilder to(String topic, Consumer<Received> callback) {
return new SubscribeRequestBuilder(new SubscribeRequest(topic, callback));
}
public SubscribeRequestBuilder startAt(Position position) {
this.subscribeRequest.position = position;
return this;
}
public SubscribeRequestBuilder seek(Seek seek) {
this.subscribeRequest.seek = requireNonNull(seek, "Seek must not be null");
return this;
}
public SubscribeRequest build() {
return subscribeRequest;
}
public static class SubscribeRequest {
private final String topic;
private final Consumer<Received> callback;
private Position position;
private Seek seek = Seek.latest;
private SubscribeRequest(String topic, Consumer<Received> callback) {
this.topic = topic;
this.callback = callback;
}
public String getTopic() {
return topic;
}
public Position getPosition() {
return position;
}
public Seek getSeek() {
return seek;
}
public Consumer<Received> getCallback() {
return callback;
}
}
}
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