{"action":"created","issue":{"url":"https://api.github.com/repos/yarpc/yarpc-java/issues/15","repository_url":"https://api.github.com/repos/yarpc/yarpc-java","labels_url":"https://api.github.com/repos/yarpc/yarpc-java/issues/15/labels{/name}","comments_url":"https://api.github.com/repos/yarpc/yarpc-java/issues/15/comments","events_url":"https://api.github.com/repos/yarpc/yarpc-java/issues/15/events","html_url":"https://github.com/yarpc/yarpc-java/issues/15","id":133118436,"number":15,"title":"Add precondition check","user":{"login":"junchaowu","id":3731781,"avatar_url":"https://avatars.githubusercontent.com/u/3731781?v=3","gravatar_id":"","url":"https://api.github.com/users/junchaowu","html_url":"https://github.com/junchaowu","followers_url":"https://api.github.com/users/junchaowu/followers","following_url":"https://api.github.com/users/junchaowu/following{/other_user}","gists_url":"https://api.github.com/users/junchaowu/gists{/gist_id}","starred_url":"https://api.github.com/users/junchaowu/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/junchaowu/subscriptions","organizations_url":"https://api.github.com/users/junchaowu/orgs","repos_url":"https://api.github.com/users/junchaowu/repos","events_url":"https://api.github.com/users/junchaowu/events{/privacy}","received_events_url":"https://api.github.com/users/junchaowu/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":2,"created_at":"2016-02-11T23:39:34Z","updated_at":"2016-02-15T22:05:51Z","closed_at":null,"body":"consider using lombok  or use guava's"},"comment":{"url":"https://api.github.com/repos/yarpc/yarpc-java/issues/comments/184415058","html_url":"https://github.com/yarpc/yarpc-java/issues/15#issuecomment-184415058","issue_url":"https://api.github.com/repos/yarpc/yarpc-java/issues/15","id":184415058,"user":{"login":"prashantv","id":140159,"avatar_url":"https://avatars.githubusercontent.com/u/140159?v=3","gravatar_id":"","url":"https://api.github.com/users/prashantv","html_url":"https://github.com/prashantv","followers_url":"https://api.github.com/users/prashantv/followers","following_url":"https://api.github.com/users/prashantv/following{/other_user}","gists_url":"https://api.github.com/users/prashantv/gists{/gist_id}","starred_url":"https://api.github.com/users/prashantv/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/prashantv/subscriptions","organizations_url":"https://api.github.com/users/prashantv/orgs","repos_url":"https://api.github.com/users/prashantv/repos","events_url":"https://api.github.com/users/prashantv/events{/privacy}","received_events_url":"https://api.github.com/users/prashantv/received_events","type":"User","site_admin":false},"created_at":"2016-02-15T22:05:51Z","updated_at":"2016-02-15T22:05:51Z","body":"I think guava uses `NonnullByDefault`:\r\nhttps://jsr-305.googlecode.com/svn/trunk/javadoc/javax/annotation/ParametersAreNonnullByDefault.html\r\n\r\nAnd only parameters which can be nullable (which should be minimized) use the `@Nullable` annotation.\r\n\r\nDo we want every parameter annotated with either `Nullable` or `NonNullable`? I'd prefer if everything was non nullable by default (and ideally with autogenerated checks) and we only annotated the `Nullable` parameters (incentivizes reducing nullable parameters too which is a plus)"}}