org.springframework.integration.StaticMessageHeaderAccessor Maven / Gradle / Ivy
/*
* Copyright 2017-2019 the original author or authors.
*
* 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
*
* https://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.springframework.integration;
import java.io.Closeable;
import java.util.UUID;
import java.util.concurrent.atomic.AtomicInteger;
import org.springframework.integration.acks.AcknowledgmentCallback;
import org.springframework.lang.Nullable;
import org.springframework.messaging.Message;
import org.springframework.messaging.MessageHeaders;
import org.springframework.util.MimeType;
/**
* Lightweight type-safe header accessor avoiding object
* creation just to access a header.
*
* @author Gary Russell
*
* @since 5.0.1
*
* @see IntegrationMessageHeaderAccessor
*/
public final class StaticMessageHeaderAccessor {
private StaticMessageHeaderAccessor() {
super();
}
@Nullable
public static UUID getId(Message message) {
Object value = message.getHeaders().get(MessageHeaders.ID);
if (value == null) {
return null;
}
return (value instanceof UUID ? (UUID) value : UUID.fromString(value.toString()));
}
@Nullable
public static Long getTimestamp(Message message) {
Object value = message.getHeaders().get(MessageHeaders.TIMESTAMP);
if (value == null) {
return null;
}
return (value instanceof Long ? (Long) value : Long.parseLong(value.toString()));
}
@Nullable
public static MimeType getContentType(Message message) {
Object value = message.getHeaders().get(MessageHeaders.CONTENT_TYPE);
if (value == null) {
return null;
}
return (value instanceof MimeType ? (MimeType) value : MimeType.valueOf(value.toString()));
}
@Nullable
public static Long getExpirationDate(Message message) {
return message.getHeaders().get(IntegrationMessageHeaderAccessor.EXPIRATION_DATE, Long.class);
}
public static int getSequenceNumber(Message message) {
Number sequenceNumber = message.getHeaders().get(IntegrationMessageHeaderAccessor.SEQUENCE_NUMBER,
Number.class);
return (sequenceNumber != null ? sequenceNumber.intValue() : 0);
}
public static int getSequenceSize(Message message) {
Number sequenceSize = message.getHeaders().get(IntegrationMessageHeaderAccessor.SEQUENCE_SIZE, Number.class);
return (sequenceSize != null ? sequenceSize.intValue() : 0);
}
@Nullable
public static Integer getPriority(Message message) {
Number priority = message.getHeaders().get(IntegrationMessageHeaderAccessor.PRIORITY, Number.class);
return (priority != null ? priority.intValue() : null);
}
@Nullable
public static Closeable getCloseableResource(Message message) {
return message.getHeaders().get(IntegrationMessageHeaderAccessor.CLOSEABLE_RESOURCE, Closeable.class);
}
@Nullable
public static AtomicInteger getDeliveryAttempt(Message message) {
return message.getHeaders().get(IntegrationMessageHeaderAccessor.DELIVERY_ATTEMPT, AtomicInteger.class);
}
@Nullable
public static AcknowledgmentCallback getAcknowledgmentCallback(Message message) {
return message.getHeaders().get(IntegrationMessageHeaderAccessor.ACKNOWLEDGMENT_CALLBACK,
AcknowledgmentCallback.class);
}
@SuppressWarnings("unchecked")
@Nullable
public static T getSourceData(Message message) {
return (T) message.getHeaders().get(IntegrationMessageHeaderAccessor.SOURCE_DATA);
}
}