com.hazelcast.jet.impl.JetEvent Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2021, Hazelcast, Inc. 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.
*/
package com.hazelcast.jet.impl;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import java.util.Objects;
import static com.hazelcast.jet.impl.util.Util.toLocalTime;
/**
* Holds a stream event and its timestamp. Jet processors receive and send
* these objects, but the user's lambdas in the Pipeline API don't observe
* them.
*
* @param type of the wrapped event
*/
public final class JetEvent {
private final long timestamp;
private final T payload;
private JetEvent(long timestamp, @Nonnull T payload) {
this.timestamp = timestamp;
this.payload = payload;
}
/**
* Creates a new {@code JetEvent} with the given components.
*/
@Nullable
public static JetEvent jetEvent(long timestamp, @Nullable T payload) {
if (payload == null) {
return null;
}
return new JetEvent<>(timestamp, payload);
}
/**
* Returns the timestamp of this event.
*/
public long timestamp() {
return timestamp;
}
/**
* Returns the wrapped event.
*/
@Nonnull
public T payload() {
return payload;
}
@Override
public String toString() {
return "JetEvent{ts=" + toLocalTime(timestamp) + ", payload=" + payload + '}';
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
JetEvent jetEvent = (JetEvent) o;
return timestamp == jetEvent.timestamp && Objects.equals(payload, jetEvent.payload);
}
@Override
public int hashCode() {
return Objects.hash(payload, timestamp);
}
}