[ https://issues.apache.org/jira/browse/HADOOP-13716?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Steve Loughran updated HADOOP-13716: ------------------------------------ Attachment: HADOOP-13716-003.patch HADOOP-13716 patch 003: * expanded goal of being set of lambda expressions, rather than just eventually() & evaluate() * added intercept() to intercept exceptions, optionally look for text. Self testing! * renamed to LambdaTestUtils to emphasise role and scope * best effort at addressing codestyle warnings; IDE may still be getting indentation wrong. Again, designed to work with Java 7 alongside java 8, just works better when you can do closures without writing anonymous inner classes > Add LambdaTestUtils class for tests to make use of > -------------------------------------------------- > > Key: HADOOP-13716 > URL: https://issues.apache.org/jira/browse/HADOOP-13716 > Project: Hadoop Common > Issue Type: New Feature > Components: test > Affects Versions: 2.8.0 > Reporter: Steve Loughran > Assignee: Steve Loughran > Attachments: HADOOP-13716-001.patch, HADOOP-13716-002.patch, > HADOOP-13716-003.patch > > > To make our tests robust against timing problems and eventual consistent > stores, we need to do more spin & wait for state. > We have some code in {{GenericTestUtils.waitFor}} to await a condition being > met, but the predicate it calls doesn't throw exceptions, there's no way for > a probe to throw an exception, and all you get is the eventual "timed out" > message. > We can do better, and in closure-ready languages (scala & scalatest, groovy > and some slider code) we've examples to follow. Some of that work has been > reimplemented slightly in {{S3ATestUtils.eventually}} > I propose adding a class in the test tree, {{Eventually}} to be a > successor/replacement for these. > # has an eventually/waitfor operation taking a predicate that throws an > exception > # has an "evaluate" exception which tries to evaluate an answer until the > operation stops raising an exception. (again, from scalatest) > # plugin backoff strategies (from Scalatest; lets you do exponential as well > as linear) > # option of adding a special handler to generate the failure exception (e.g. > run more detailed diagnostics for the exception text, etc). > # be Java 8 lambda expression friendly > # be testable and tested itself. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: common-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-issues-h...@hadoop.apache.org