spring-retry RetryContext 源码
spring-retry RetryContext 代码
文件路径：/src/main/java/org/springframework/retry/RetryContext.java
/*
* Copyright 2006-2007 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.retry;
import org.springframework.core.AttributeAccessor;
/**
* Low-level access to ongoing retry operation. Normally not needed by clients, but can be
* used to alter the course of the retry, e.g. force an early termination.
*
* @author Dave Syer
*
*/
public interface RetryContext extends AttributeAccessor {
/**
* Retry context attribute name for reporting key. Can be used for reporting purposes,
* for instance in a retry listener, to accumulate data about the performance of a
* retry.
*/
String NAME = "context.name";
/**
* Retry context attribute name for state key. Can be used to identify a stateful
* retry from its context.
*/
String STATE_KEY = "context.state";
/**
* Retry context attribute that is non-null (and true) if the context has been closed.
*/
String CLOSED = "context.closed";
/**
* Retry context attribute that is non-null (and true) if the recovery path was taken.
*/
String RECOVERED = "context.recovered";
/**
* Retry context attribute that is non-null (and true) if the retry was exhausted.
*/
String EXHAUSTED = "context.exhausted";
/**
* Signal to the framework that no more attempts should be made to try or retry the
* current {@link RetryCallback}.
*/
void setExhaustedOnly();
/**
* Public accessor for the exhausted flag {@link #setExhaustedOnly()}.
* @return true if the flag has been set.
*/
boolean isExhaustedOnly();
/**
* Accessor for the parent context if retry blocks are nested.
* @return the parent or null if there is none.
*/
RetryContext getParent();
/**
* Counts the number of retry attempts. Before the first attempt this counter is zero,
* and before the first and subsequent attempts it should increment accordingly.
* @return the number of retries.
*/
int getRetryCount();
/**
* Accessor for the exception object that caused the current retry.
* @return the last exception that caused a retry, or possibly null. It will be null
* if this is the first attempt, but also if the enclosing policy decides not to
* provide it (e.g. because of concerns about memory usage).
*/
Throwable getLastThrowable();
}
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