{"action":"created","issue":{"url":"https://api.github.com/repos/kamon-io/Kamon/issues/550","repository_url":"https://api.github.com/repos/kamon-io/Kamon","labels_url":"https://api.github.com/repos/kamon-io/Kamon/issues/550/labels{/name}","comments_url":"https://api.github.com/repos/kamon-io/Kamon/issues/550/comments","events_url":"https://api.github.com/repos/kamon-io/Kamon/issues/550/events","html_url":"https://github.com/kamon-io/Kamon/issues/550","id":355022184,"node_id":"MDU6SXNzdWUzNTUwMjIxODQ=","number":550,"title":"implement \"b3 single\" header format","user":{"login":"adriancole","id":64215,"node_id":"MDQ6VXNlcjY0MjE1","avatar_url":"https://avatars2.githubusercontent.com/u/64215?v=4","gravatar_id":"","url":"https://api.github.com/users/adriancole","html_url":"https://github.com/adriancole","followers_url":"https://api.github.com/users/adriancole/followers","following_url":"https://api.github.com/users/adriancole/following{/other_user}","gists_url":"https://api.github.com/users/adriancole/gists{/gist_id}","starred_url":"https://api.github.com/users/adriancole/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/adriancole/subscriptions","organizations_url":"https://api.github.com/users/adriancole/orgs","repos_url":"https://api.github.com/users/adriancole/repos","events_url":"https://api.github.com/users/adriancole/events{/privacy}","received_events_url":"https://api.github.com/users/adriancole/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":1,"created_at":"2018-08-29T06:54:28Z","updated_at":"2018-10-16T02:07:32Z","closed_at":"2018-10-15T18:35:25Z","author_association":"NONE","body":"As discussed on https://github.com/openzipkin/b3-propagation/issues/21 and first implemented here: https://github.com/openzipkin/brave/blob/master/brave/src/main/java/brave/propagation/B3SingleFormat.java https://github.com/openzipkin/brave/blob/master/brave/src/test/java/brave/propagation/B3SingleFormatTest.java\r\n\r\nLet's support at least reading \"b3\" header from a single string, most commonly traceid-spanid-1\r\nIt would also be nice to support optionally writing this, especially in message providers or others with constrained environments.\r\n\r\nBrave currently has a property like this, but its name could change with feedback:\r\n```java\r\n    /**\r\n     * When true, only writes a single {@link B3SingleFormat b3 header} for outbound propagation.\r\n     *\r\n     * <p>Use this to reduce overhead. Note: normal {@link Tracing#propagation()} is used to parse\r\n     * incoming headers. The implementation must be able to read \"b3\" headers.\r\n     */\r\n    public Builder b3SingleFormat(boolean b3SingleFormat) {\r\n      this.b3SingleFormat = b3SingleFormat;\r\n      return this;\r\n}\r\n```"},"comment":{"url":"https://api.github.com/repos/kamon-io/Kamon/issues/comments/430075468","html_url":"https://github.com/kamon-io/Kamon/issues/550#issuecomment-430075468","issue_url":"https://api.github.com/repos/kamon-io/Kamon/issues/550","id":430075468,"node_id":"MDEyOklzc3VlQ29tbWVudDQzMDA3NTQ2OA==","user":{"login":"adriancole","id":64215,"node_id":"MDQ6VXNlcjY0MjE1","avatar_url":"https://avatars2.githubusercontent.com/u/64215?v=4","gravatar_id":"","url":"https://api.github.com/users/adriancole","html_url":"https://github.com/adriancole","followers_url":"https://api.github.com/users/adriancole/followers","following_url":"https://api.github.com/users/adriancole/following{/other_user}","gists_url":"https://api.github.com/users/adriancole/gists{/gist_id}","starred_url":"https://api.github.com/users/adriancole/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/adriancole/subscriptions","organizations_url":"https://api.github.com/users/adriancole/orgs","repos_url":"https://api.github.com/users/adriancole/repos","events_url":"https://api.github.com/users/adriancole/events{/privacy}","received_events_url":"https://api.github.com/users/adriancole/received_events","type":"User","site_admin":false},"created_at":"2018-10-16T02:07:32Z","updated_at":"2018-10-16T02:07:32Z","author_association":"NONE","body":"yay!\n"}}
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