RetryOptions (Google App Engine API for Java)

com.google.appengine.api.taskqueue

Class RetryOptions

  • java.lang.Object
    • com.google.appengine.api.taskqueue.RetryOptions
  • All Implemented Interfaces:
    java.io.Serializable

    public final class RetryOptions
extends java.lang.Object
implements java.io.Serializable
    Contains various options for a task's retry strategy. Calls to RetryOptions methods may be chained to specify multiple options in the one RetryOptions object.

    Notes on usage:
    The recommended way to instantiate a RetryOptions object is to statically import RetryOptions.Builder.* and invoke a static creation method followed by an instance mutator (if needed): 

     import static com.google.appengine.api.taskqueue.RetryOptions.Builder.*;

 ...
 RetryOptions retry = withTaskRetryLimit(10).taskAgeLimitSeconds("4d")
     .minBackoffSeconds(120).maxBackoffSeconds(3600).maxDoublings(5);
 QueueFactory.getDefaultQueue().add(retryOptions(retry));

    See Also:
    Serialized Form

    • Constructor Detail

    • Method Detail

      • taskRetryLimit

        public RetryOptions taskRetryLimit(int taskRetryLimit)
        Sets the number of retries allowed before a task can fail permanently. If both taskRetryLimit and taskAgeLimitSeconds are specified, then both limits must be exceeded before a task can fail permanently.

      • taskAgeLimitSeconds

        public RetryOptions taskAgeLimitSeconds(long taskAgeLimitSeconds)
        Sets the maximum age from the first attempt to execute a task after which any new task failure can be permanent. If both taskRetryLimit and taskAgeLimitSeconds are specified, then both limits must be exceeded before a task can fail permanently.
        Parameters:
        taskAgeLimitSeconds - The age limit in seconds. Must not be negative.
        Returns:
        the RetryOptions object for chaining.

      • minBackoffSeconds

        public RetryOptions minBackoffSeconds(double minBackoffSeconds)
        Sets the minimum retry backoff interval, in seconds.
        Parameters:
        minBackoffSeconds - Seconds value for the minimum backoff interval.
        Returns:
        the RetryOptions object for chaining.

      • maxBackoffSeconds

        public RetryOptions maxBackoffSeconds(double maxBackoffSeconds)
        Sets the maximum retry backoff interval, in seconds.
        Parameters:
        maxBackoffSeconds - Seconds value for the maximum backoff interval.
        Returns:
        the RetryOptions object for chaining.

      • maxDoublings

        public RetryOptions maxDoublings(int maxDoublings)
        Sets the maximum times the retry backoff interval should double before rising linearly to the maximum.
        Parameters:
        maxDoublings - The number of allowed doublings. Must not be negative.
        Returns:
        the RetryOptions object for chaining.

      • hashCode

        public int hashCode()
        Overrides:
        hashCode in class java.lang.Object

      • equals

        public boolean equals(java.lang.Object obj)
        Overrides:
        equals in class java.lang.Object

      • toString

        public java.lang.String toString()
        Overrides:
        toString in class java.lang.Object