diff options
author | Robert Newson <rnewson@apache.org> | 2011-05-17 11:15:14 +0000 |
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committer | Robert Newson <rnewson@apache.org> | 2011-05-17 11:15:14 +0000 |
commit | e8e4b0d293021fe90326a85828f3cfb087bf18b7 (patch) | |
tree | 986f544eac623ec23b769b36828894f93a173aa3 /1.1.x/share/www/script/test/delayed_commits.js | |
parent | da6a5322b0b8084f434752060caa8be214c6f4fa (diff) |
tagging 1.1.0
git-svn-id: https://svn.apache.org/repos/asf/couchdb/tags/1.1.0@1104149 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to '1.1.x/share/www/script/test/delayed_commits.js')
-rw-r--r-- | 1.1.x/share/www/script/test/delayed_commits.js | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/1.1.x/share/www/script/test/delayed_commits.js b/1.1.x/share/www/script/test/delayed_commits.js new file mode 100644 index 00000000..dbb072fb --- /dev/null +++ b/1.1.x/share/www/script/test/delayed_commits.js @@ -0,0 +1,154 @@ +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy of +// the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations under +// the License. + +couchTests.delayed_commits = function(debug) { + var db = new CouchDB("test_suite_db", {"X-Couch-Full-Commit":"false"}); + db.deleteDb(); + db.createDb(); + if (debug) debugger; + + run_on_modified_server( + [{section: "couchdb", + key: "delayed_commits", + value: "true"}], + + function () { + // By default, couchdb doesn't fully commit documents to disk right away, + // it waits about a second to batch the full commit flush along with any + // other updates. If it crashes or is restarted you may lose the most + // recent commits. + + T(db.save({_id:"1",a:2,b:4}).ok); + T(db.open("1") != null); + + restartServer(); + + T(db.open("1") == null); // lost the update. + // note if we waited > 1 sec before the restart, the doc would likely + // commit. + + + // Retry the same thing but with full commits on. + + var db2 = new CouchDB("test_suite_db", {"X-Couch-Full-Commit":"true"}); + + T(db2.save({_id:"1",a:2,b:4}).ok); + T(db2.open("1") != null); + + restartServer(); + + T(db2.open("1") != null); + + // You can update but without committing immediately, and then ensure + // everything is commited in the last step. + + T(db.save({_id:"2",a:2,b:4}).ok); + T(db.open("2") != null); + T(db.ensureFullCommit().ok); + restartServer(); + + T(db.open("2") != null); + + // However, it's possible even when flushed, that the server crashed between + // the update and the commit, and you don't want to check to make sure + // every doc you updated actually made it to disk. So record the instance + // start time of the database before the updates and then check it again + // after the flush (the instance start time is returned by the flush + // operation). if they are the same, we know everything was updated + // safely. + + // First try it with a crash. + + var instanceStartTime = db.info().instance_start_time; + + T(db.save({_id:"3",a:2,b:4}).ok); + T(db.open("3") != null); + + restartServer(); + + var commitResult = db.ensureFullCommit(); + T(commitResult.ok && commitResult.instance_start_time != instanceStartTime); + // start times don't match, meaning the server lost our change + + T(db.open("3") == null); // yup lost it + + // retry with no server restart + + var instanceStartTime = db.info().instance_start_time; + + T(db.save({_id:"4",a:2,b:4}).ok); + T(db.open("4") != null); + + var commitResult = db.ensureFullCommit(); + T(commitResult.ok && commitResult.instance_start_time == instanceStartTime); + // Successful commit, start times match! + + restartServer(); + + T(db.open("4") != null); + }); + + // Now test that when we exceed the max_dbs_open, pending commits are safely + // written. + T(db.save({_id:"5",foo:"bar"}).ok); + var max = 2; + run_on_modified_server( + [{section: "couchdb", + key: "delayed_commits", + value: "true"}, + {section: "couchdb", + key: "max_dbs_open", + value: max.toString()}], + + function () { + for(var i=0; i<max; i++) { + var dbi = new CouchDB("test_suite_db" + i); + dbi.deleteDb(); + dbi.createDb(); + } + T(db.open("5").foo=="bar"); + for(var i=0; i<max+1; i++) { + var dbi = new CouchDB("test_suite_db" + i); + dbi.deleteDb(); + } + }); + + + // Test that a conflict can't cause delayed commits to fail + run_on_modified_server( + [{section: "couchdb", + key: "delayed_commits", + value: "true"}], + + function() { + //First save a document and commit it + T(db.save({_id:"6",a:2,b:4}).ok); + T(db.ensureFullCommit().ok); + //Generate a conflict + try { + db.save({_id:"6",a:2,b:4}); + } catch( e) { + T(e.error == "conflict"); + } + //Wait for the delayed commit interval to pass + var time = new Date(); + while(new Date() - time < 2000); + //Save a new doc + T(db.save({_id:"7",a:2,b:4}).ok); + //Wait for the delayed commit interval to pass + var time = new Date(); + while(new Date() - time < 2000); + //Crash the server and make sure the last doc was written + restartServer(); + T(db.open("7") != null); + }); +}; |