Merge pull request #1 from redgeoff/initial

feat(initial)

Author: redgeoff

README.md

@@ -1,5 +1,7 @@
 # replicate-couchdb-cluster
 
+[![Circle CI](https://circleci.com/gh/redgeoff/replicate-couchdb-cluster.svg?style=svg&circle-token=29186a9bacd110b627323d86119076539d8b144e)](https://circleci.com/gh/redgeoff/replicate-couchdb-cluster)
+
 A fault-tolerant way to replicate an entire CouchDB cluster
 
 

circle.yml

@@ -1,21 +1,40 @@
 # Doesn't actually work!
 # node:
-#  version: 7.10.0
+#  version: 8.1.4
+
+# Uncomment to test with CouchDB 2
+machine:
+  services:
+    - docker
 
 dependencies:
   pre:
-    - nvm install 7.10.0
-    - nvm use 7.10.0 && npm install -g npm
+    - nvm install 8.1.4
+    - nvm use 8.1.4 && npm install -g npm
+
+    # Install CouchDB 2
+    - docker run -d --name couchdb --restart always -p 5984:5984 -e COUCHDB_USER='admin' -e COUCHDB_PASSWORD='admin' redgeoff/couchdb
+    # Wait for DB to be ready
+    - sleep 15
+    # Create system DBs
+    - curl -X PUT http://admin:[email protected]:5984/_users
+    - curl -X PUT http://admin:[email protected]:5984/_replicator
+    - curl -X PUT http://admin:[email protected]:5984/_global_changes
+
+    # Enable CORS
+    - nvm use 8.1.4 && npm install -g add-cors-to-couchdb
+    - nvm use 8.1.4 && add-cors-to-couchdb http://localhost:5984 -u admin -p admin
 
   override:
-    - nvm use 7.10.0 && npm install
+    - nvm use 8.1.4 && npm install
 
 test:
   pre:
-    - nvm use 7.10.0 && npm run assert-beautified
-    - nvm use 7.10.0 && npm run jshint
+    - nvm use 8.1.4 && npm run assert-beautified
+    - nvm use 8.1.4 && npm run jshint
 
   override:
-    - nvm use 7.10.0 && npm run node-full-test
-    - nvm use 7.10.0 && npm run browser-test-phantomjs
-    - nvm use 7.10.0 && npm run browser-coverage-full-test
+    # Test on CouchDB 2
+    - nvm use 8.1.4 && npm run node-full-test
+    - nvm use 8.1.4 && npm run browser-test-phantomjs
+    - nvm use 8.1.4 && npm run browser-coverage-full-test

package.json

@@ -55,6 +55,8 @@
     ]
   },
   "dependencies": {
-    "sporks": "0.0.1"
+    "couch-slouch": "0.0.3",
+    "sporks": "0.0.1",
+    "squadron": "0.0.3"
   }
 }

scripts/cluster.js

@@ -0,0 +1,69 @@
+'use strict';
+
+var Slouch = require('couch-slouch'),
+  squadron = require('squadron');
+
+// params
+//   source
+//   target
+//   concurrency
+//   skip
+var Cluster = function (params) {
+  this._params = params;
+
+  this._sourceSlouch = new Slouch(params.source);
+  this._targetSlouch = new Slouch(params.target);
+
+  if (this._params.concurrency === 1) {
+    // Don't use a throttler
+    this._throttler = undefined;
+  } else {
+    // Create a throttler with the specified or default concurrency
+    var concurrency = this._params.concurrency ? this._params.concurrency : null;
+    this._throttler = new squadron.Throttler(concurrency);
+  }
+};
+
+Cluster.prototype.replicate = function () {
+  var self = this;
+  return self._sourceSlouch.db.all().each(function (db) {
+    if (!self._params.skip || self._params.skip.indexOf(db) === -1) {
+      return self._replicateDB(db, db);
+    }
+  }, self._throttler);
+};
+
+Cluster.prototype._createDBIfMissing = function (db) {
+  var self = this;
+  return self._targetSlouch.db.exists(db).then(function (exists) {
+    if (!exists) {
+      return self._targetSlouch.db.create(db);
+    }
+  });
+};
+
+Cluster.prototype._replicateSecurity = function (sourceDB, targetDB) {
+  var self = this;
+  return self._sourceSlouch.security.get(sourceDB).then(function (security) {
+    return self._targetSlouch.security.set(targetDB, security);
+  });
+};
+
+Cluster.prototype._replicateRawDB = function (sourceDB, targetDB) {
+  return this._sourceSlouch.db.replicate({
+    source: this._params.source + '/' + sourceDB,
+    target: this._params.target + '/' + targetDB
+  });
+};
+
+Cluster.prototype._replicateDB = function (sourceDB, targetDB) {
+  var self = this;
+  return self._createDBIfMissing(targetDB).then(function () {
+    // Replicate security first so that security is put in place before data is copied over
+    return self._replicateSecurity(sourceDB, targetDB);
+  }).then(function () {
+    return self._replicateRawDB(sourceDB, targetDB);
+  });
+};
+
+module.exports = Cluster;

scripts/foo.js

@@ -0,0 +1,3 @@
+'use strict';
+
+module.exports = require('./cluster');

scripts/index.js

@@ -4,18 +4,4 @@ var chai = require('chai');
 chai.use(require('chai-as-promised'));
 chai.should();
 
-var Foo = require('../scripts/foo');
-
 require('./node-and-browser');
-
-describe('browser', function () {
-
-  it('should test in only the browser', function () {
-    // TODO: insert tests that can only be tested in the browser
-    var foo = new Foo();
-    return foo.bar().then(function (thing) {
-      thing.should.eql('yar');
-    });
-  });
-
-});