{"metadata":{"image":[],"title":"","description":""},"api":{"url":"","auth":"required","settings":"","params":[],"results":{"codes":[]}},"next":{"description":"","pages":[]},"title":"Reachable Operation","type":"basic","slug":"reachable-operation","excerpt":"","body":"`ReachableCondition` will ensure that a provided host is reachable before executing an operation. This is great, but in some cases there is not a known host, for example, when using `CloudKitOperation` where the device must be online. In these situations, we can compose an operation inside a `ReachableOperation`.\n[block:code]\n{\n  \"codes\": [\n    {\n      \"code\": \"let operation = ReachableOperation(aCriticalNetworkingOperation)\\nqueue.addOperation(operation)\",\n      \"language\": \"swift\",\n      \"name\": \"reachable operation\"\n    }\n  ]\n}\n[/block]\nThe `ReachableOperation` will register itself with an internal `Reachability` service, so that only when the status is available will the composed operation be executed.","updates":[],"order":7,"isReference":false,"hidden":false,"sync_unique":"","link_url":"","link_external":false,"_id":"5674016058c4890d00bb5558","user":"5654ea8be0d82b0d00ab5747","project":"5672fc989996590d00c22c65","version":{"version":"2.5.0","version_clean":"2.5.0","codename":"","is_stable":true,"is_beta":false,"is_hidden":false,"is_deprecated":false,"categories":["5672fc999996590d00c22c69","567301169d4c060d009da8b3","56730183547bee0d00997d1a","5673018a06b19d0d0010691b","567301b53054630d00fe9288","567400638565060d009a86fb","5674017bf79ca90d00ad2f67"],"_id":"5672fc989996590d00c22c68","__v":7,"createdAt":"2015-12-17T18:19:04.699Z","project":"5672fc989996590d00c22c65","releaseDate":"2015-12-17T18:19:04.699Z"},"category":{"sync":{"isSync":false,"url":""},"pages":["567400df22cd7e0d00fada7f","56740103f65d9c0d002e3d5e","5674010f47f7010d005bff1a","56740128f79ca90d00ad2f65","5674014947f7010d005bff1c","5674015622cd7e0d00fada81","5674016058c4890d00bb5558"],"title":"Available Operations","slug":"available-operations","order":2,"from_sync":false,"reference":false,"_id":"567400638565060d009a86fb","__v":7,"createdAt":"2015-12-18T12:47:31.547Z","project":"5672fc989996590d00c22c65","version":"5672fc989996590d00c22c68"},"__v":3,"createdAt":"2015-12-18T12:51:44.700Z","githubsync":""}

Reachable Operation


`ReachableCondition` will ensure that a provided host is reachable before executing an operation. This is great, but in some cases there is not a known host, for example, when using `CloudKitOperation` where the device must be online. In these situations, we can compose an operation inside a `ReachableOperation`. [block:code] { "codes": [ { "code": "let operation = ReachableOperation(aCriticalNetworkingOperation)\nqueue.addOperation(operation)", "language": "swift", "name": "reachable operation" } ] } [/block] The `ReachableOperation` will register itself with an internal `Reachability` service, so that only when the status is available will the composed operation be executed.