remove unused module

index.js

@@ -72,14 +72,23 @@ module.exports = {
     },
     storage: {
         metadata: {
-            MetadataFileServer:
-            require('./lib/storage/metadata/file/MetadataFileServer'),
-            MetadataFileClient:
-            require('./lib/storage/metadata/file/MetadataFileClient'),
-            LogConsumer:
-            require('./lib/storage/metadata/bucketclient/LogConsumer'),
-            MongoClientInterface:
-            require('./lib/storage/metadata/mongoclient/MongoClientInterface'),
+            bucketclient: {
+                LogConsumer:
+                require('./lib/storage/metadata/bucketclient/LogConsumer'),
+            },
+            file: {
+                MetadataFileServer:
+                require('./lib/storage/metadata/file/MetadataFileServer'),
+                MetadataFileClient:
+                require('./lib/storage/metadata/file/MetadataFileClient'),
+            },
+            mongoclient: {
+                MongoClientInterface:
+                require('./lib/storage/metadata/mongoclient/' +
+                    'MongoClientInterface'),
+                LogConsumer:
+                require('./lib/storage/metadata/mongoclient/LogConsumer'),
+            },
         },
         data: {
             file: {

lib/storage/metadata/mongoclient/LogConsumer.js

@@ -0,0 +1,334 @@
+'use strict'; // eslint-disable-line
+
+const stream = require('stream');
+const MongoClient = require('mongodb').MongoClient;
+const { Timestamp, Long } = require('bson');
+
+let lastEndID = undefined;
+
+const ops = {
+    i: 'put',
+    u: 'put',
+    d: 'delete',
+};
+
+class ListRecordStream extends stream.Transform {
+    constructor(logger) {
+        super({ objectMode: true });
+        this.logger = logger;
+        this.hasStarted = false;
+        this.start = undefined;
+        this.end = undefined;
+        this.lastUniqID = undefined;
+        // this.unpublishedListing is true once we pass the oplog that has the
+        // start seq timestamp and uniqID 'h'
+        this.unpublishedListing = undefined;
+    }
+
+    _transform(itemObj, encoding, callback) {
+        if (!itemObj) {
+            this.push(null);
+            this.emit('info', {
+                start: this.start,
+                end: this.end,
+                uniqID: this.lastUniqID,
+            });
+            return callback();
+        }
+
+        // always update to most recent uniqID
+        this.lastUniqID = itemObj.h.toString();
+
+        if (this.end === undefined || itemObj.ts.toNumber() > this.end) {
+            this.end = itemObj.ts.toNumber();
+        }
+
+        // only push to stream unpublished objects
+        if (!this.unpublishedListing) {
+            if (lastEndID === itemObj.h.toString()) {
+                this.unpublishedListing = true;
+            }
+            return callback();
+        }
+
+        if (!this.hasStarted) {
+            this.hasStarted = true;
+            this.start = itemObj.ts.toNumber();
+            this.emit('info', {
+                start: this.start,
+                end: this.end,
+                uniqId: this.lastUniqID,
+            });
+        }
+
+        // don't push oplogs that have already been sent
+        if (!this.unpublishedListing) {
+            return callback();
+        }
+
+        const streamObject = {
+            timestamp: new Date(itemObj.ts.high_ * 1000),
+            db: itemObj.ns,
+            entries: [
+                {
+                    type: ops[itemObj.op],
+                    key: itemObj.o._id,
+                    value: JSON.stringify(itemObj.o.value),
+                },
+            ],
+        };
+        return callback(null, streamObject);
+    }
+
+    _flush(callback) {
+        this.emit('info', {
+            start: this.start,
+            end: this.end,
+            uniqID: this.lastUniqID,
+        });
+        this.push(null);
+        callback();
+    }
+}
+
+/**
+ * @class
+ * @classdesc Class to consume mongo oplog
+ */
+class LogConsumer {
+
+    /**
+     * @constructor
+     *
+     * @param {string} host - string that is MongoDB host
+     * @param {number} port - port at host name for MongoDB instance
+     * @param {string} database - name of database to get replica set oplogs
+     */
+    constructor(mongoConfig, logger) {
+        const { host, port, database, writeConcern, replicaSet, readPreference } = mongoConfig;
+        // need a way to connect to master
+        // might have to use all replica set members in uri? http://mongodb.github.io/node-mongodb-native/3.0/tutorials/connect/
+
+        // can have second argument {ts: timestamp} to call only entries from some number
+        // this ts gets translated to find({ts: {$gt: ts }}) in mongo language
+        // but if have it here on instantiation, won't work.  we are sending the sequence on
+        // each read call.
+        // so might be better to do query like this directly (without module)
+// https://github.com/cayasso/mongo-oplog/blob/master/src/stream.js#L28
+
+        // and then use the stream method in the same way to get just the number
+        // of entries needed -- http://mongodb.github.io/node-mongodb-native/3.0/api/Cursor.html#stream
+
+        // 'local' is the database where MongoDB has oplogs.rs capped collection
+        this.database = 'local';
+        // this.mongoUrl = format(
+        //     'mongodb://%s:%s/local',
+        //     host,
+        //     port);
+        this.mongoUrl = 'mongodb://localhost:27018,localhost:27017,localhost:27019/local';
+        this.logger = logger;
+    }
+
+    /**
+     * Connect to MongoClient using Mongo node module to access database and
+     * database oplogs (operation logs)
+     *
+     * @param {function} done - callback function, called with an error object
+     * or null and an object as 2nd parameter
+     * @return {undefined}
+    */
+    connectMongo(done) {
+        MongoClient.connect(this.mongoUrl, { replicaSet: 'rs0' },
+        (err, client) => {
+            if (err) {
+                this.logger.error('Unable to connect to MongoDB', err);
+                return done(err);
+            }
+            this.logger.info('connected to mongodb');
+            this.client = client;
+            this.db = client.db(this.database, {
+                ignoreUndefined: true,
+            });
+            return done();
+        });
+    }
+    /**
+     * Read a series of log records from mongo
+     *
+     * @param {Object} [params] - params object
+     * @param {Number} [params.startSeq] - fetch starting from this
+     *   sequence number
+     * @param {Number} [params.limit] - maximum number of log records
+     *   to return
+     * @param {function} cb - callback function, called with an error
+     *   object or null and an object as 2nd parameter
+     * // CONTINUE HERE!!!
+     *   object.info contains ...
+     *   object.log contains ... (see recordstream below) and _processPrepareEntries function
+     * in backbeat. batchState.logRes is object.log from here.
+     *
+     * @return {undefined}
+     */
+    readRecords(params, cb) {
+        const recordStream = new ListRecordStream(this.logger);
+        const limit = params.limit || 10000;
+        const startIDandSeq = params.startSeq.toString().split('|');
+        const startSeq = parseInt(startIDandSeq[0], 10) || 0;
+        lastEndID = startIDandSeq[1];
+        // need to somehow limit entries to limit and then stop the stream
+
+        this.coll = this.db.collection('oplog.rs');
+        return this.coll.find({
+            ns: /^(?!.*metadata.*(?:__)).*metadata\.\w+.*/,
+            ts: { $gte: Timestamp.fromNumber(startSeq) },
+        }, {
+            limit,
+            tailable: false,
+            awaitData: false,
+            noCursorTimeout: true,
+            OplogReplay: true,
+            numberOfRetries: Number.MAX_VALUE,
+        }, (err, res) => {
+            // console.log('LOG RESPONSE', res);
+            const stream = res.stream();
+            stream.on('data', data => {
+                recordStream.write(data);
+            });
+            stream.on('end', () => {
+                recordStream.write(undefined);
+            });
+            recordStream.once('info', info => {
+                recordStream.removeAllListeners('error');
+                cb(null, { info, log: recordStream });
+            });
+            return undefined;
+        });
+    }
+}
+
+// const tester = new LogConsumer({ host: '127.0.0.1', port: ['27017'],
+//     database: 'local', writeConcern: 'majority', replicaSet: 'rs0',
+//     readPreference: 'primary' }, console);
+//
+// tester.connectMongo(() => {
+//     return async.waterfall([
+//         next => {
+//             return tester.readRecords({ startSeq: 0, limit: 5 }, (err, res) => {
+//                 console.log('cb called for read records');
+//                 res.log.on('data', data => {
+//                    console.log('Streamed formatted data', data);
+//                 });
+//                 res.log.on('end', () => {
+//                     console.log('ENDED');
+//                     return next();
+//                 });
+//             });
+//         },
+//     ], () => {});
+// });
+
+module.exports = LogConsumer;
+
+//
+// sample put:
+//
+// insert!!  { ts: Timestamp { _bsontype: 'Timestamp', low_: 1, high_: 1516323641 },
+//   t: 1,
+//   h: Long { _bsontype: 'Long', low_: -1207597211, high_: -1765392211 },
+//   v: 2,
+//   op: 'i',
+//   ns: 'metadata.hello',
+//   ui:
+//    Binary {
+//      _bsontype: 'Binary',
+//      sub_type: 4,
+//      position: 16,
+//      buffer: <Buffer 66 bd 4e 7d 0b 92 4a 12 b8 cc 77 b1 26 8a 94 cb> },
+//   wall: 2018-01-19T01:00:41.798Z,
+//   o:
+//    { _id: 'stuff4',
+//      value:
+//       { 'owner-display-name': 'Bart',
+//         'owner-id': '79a59df900b949e55d96a1e698fbacedfd6e09d98eacf8f8d5218e7cd47ef2be',
+//         'content-length': 508,
+//         'content-type': 'binary/octet-stream',
+//         'content-md5': '656c3fe292407ccfdc9b125b37cc1930',
+//         'x-amz-version-id': 'null',
+//         'x-amz-server-version-id': '',
+//         'x-amz-storage-class': 'STANDARD',
+//         'x-amz-server-side-encryption': '',
+//         'x-amz-server-side-encryption-aws-kms-key-id': '',
+//         'x-amz-server-side-encryption-customer-algorithm': '',
+//         'x-amz-website-redirect-location': '',
+//         acl: [Object],
+//         key: '',
+//         location: [Object],
+//         isDeleteMarker: false,
+//         tags: {},
+//         replicationInfo: [Object],
+//         dataStoreName: 'us-east-1',
+//         'last-modified': '2018-01-19T01:00:41.797Z',
+//         'md-model-version': 3,
+//         'x-amz-meta-s3cmd-attrs': 'uid:501/gname:staff/uname:lhs/gid:20/mode:33188/mtime:1508801827/atime:1516323377/md5:656c3fe292407ccfdc9b125b37cc1930/ctime:1508801827' } } }
+
+  //       sample update:
+  //
+  //       update!!  { ts: Timestamp { _bsontype: 'Timestamp', low_: 1, high_: 1516323702 },
+  // t: 1,
+  // h: Long { _bsontype: 'Long', low_: -1991728232, high_: -721376083 },
+  // v: 2,
+  // op: 'u',
+  // ns: 'metadata.hello',
+  // ui:
+  //  Binary {
+  //    _bsontype: 'Binary',
+  //    sub_type: 4,
+  //    position: 16,
+  //    buffer: <Buffer 66 bd 4e 7d 0b 92 4a 12 b8 cc 77 b1 26 8a 94 cb> },
+  // o2: { _id: 'stuff4' },
+  // wall: 2018-01-19T01:01:42.050Z,
+  // o:
+  //  { _id: 'stuff4',
+  //    value:
+  //     { 'owner-display-name': 'Bart',
+  //       'owner-id': '79a59df900b949e55d96a1e698fbacedfd6e09d98eacf8f8d5218e7cd47ef2be',
+  //       'content-length': 508,
+  //       'content-type': 'binary/octet-stream',
+  //       'content-md5': '656c3fe292407ccfdc9b125b37cc1930',
+  //       'x-amz-version-id': 'null',
+  //       'x-amz-server-version-id': '',
+  //       'x-amz-storage-class': 'STANDARD',
+  //       'x-amz-server-side-encryption': '',
+  //       'x-amz-server-side-encryption-aws-kms-key-id': '',
+  //       'x-amz-server-side-encryption-customer-algorithm': '',
+  //       'x-amz-website-redirect-location': '',
+  //       acl: [Object],
+  //       key: '',
+  //       location: [Object],
+  //       isDeleteMarker: false,
+  //       tags: {},
+  //       replicationInfo: [Object],
+  //       dataStoreName: 'us-east-1',
+  //       'last-modified': '2018-01-19T01:01:42.022Z',
+  //       'md-model-version': 3,
+  //       'x-amz-meta-s3cmd-attrs': 'uid:501/gname:staff/uname:lhs/gid:20/mode:33188/mtime:1508801827/atime:1516323641/md5:656c3fe292407ccfdc9b125b37cc1930/ctime:1508801827' } } }
+  //
+  //
+  //
+  //       sample delete:
+  //
+  //       delete!!  { ts: Timestamp { _bsontype: 'Timestamp', low_: 1, high_: 1516323746 },
+  // t: 1,
+  // h: Long { _bsontype: 'Long', low_: 2036516563, high_: 689237179 },
+  // v: 2,
+  // op: 'd',
+  // ns: 'metadata.hello',
+  // ui:
+  //  Binary {
+  //    _bsontype: 'Binary',
+  //    sub_type: 4,
+  //    position: 16,
+  //    buffer: <Buffer 66 bd 4e 7d 0b 92 4a 12 b8 cc 77 b1 26 8a 94 cb> },
+  // wall: 2018-01-19T01:02:26.962Z,
+  // o: { _id: 'stuff4' } }
+  //

lib/storage/metadata/mongoclient/MongoClientInterface.js

@@ -34,8 +34,6 @@ const ASYNC_REPAIR_TIMEOUT = 15000;
 
 let uidCounter = 0;
 
-const format = require('util').format;
-
 const VID_SEP = require('../../../versioning/constants')
     .VersioningConstants.VersionId.Separator;
 
@@ -70,30 +68,20 @@ function generatePHDVersion(versionId) {
  * @param {Object} params - constructor params
  * @param {String} params.host - host for mongo
  * @param {String} params.port - port for mongo
- * @param {String} params.writeConcern - writeConcern for mongo
- * @param {String} params.replicaSet - replicaSet for mongo
- * @param {String} params.readPreference - readPreference for mongo
+ * @param {String} params.replicationGroupId - replication group id
+ * used here to generate version id's
+ * // Does backbeat use this at all? Can we make this optional and
+ * // set a default so when instantiate the client elsewhere don't need?
  * @param {String} params.database - name of database
  * @param {werelogs.Logger} params.logger - logger instance
  * @param {String} [params.path] - path for mongo volume
- * @param {String} [params.replicationGroupId] - replication group id
- * used here to generate version id's on puts. S3 instantiates the class
- * but backbeat does not
  */
 class MongoClientInterface {
-
     constructor(params) {
-        const { host, port,
-                writeConcern, replicaSet, readPreference,
-                path, database, logger,
+        const { host, port, path, database, logger,
             replicationGroupId } = params;
-        const mongoUrl = format(
-            'mongodb://%s:%s/w=%s&replicaSet=%s&readPreference=%s',
-            host,
-            port,
-            writeConcern,
-            replicaSet,
-            readPreference);
+        const mongoUrl =
+              `mongodb://${host}:${port}`;
         this.logger = logger;
         this.client = null;
         this.db = null;
@@ -106,8 +94,6 @@ class MongoClientInterface {
         // initialize this backend
         MongoClient.connect(mongoUrl, (err, client) => {
             if (err) {
-                this.logger.error('error connecting to mongo server',
-                { error: err.message });
                 throw (errors.InternalError);
             }
             this.logger.debug('connected to mongodb');
@@ -171,9 +157,6 @@ class MongoClientInterface {
             _id: bucketName,
         }, {}, (err, doc) => {
             if (err) {
-                log.error(
-                    'getBucketAttributes: error getting bucket attributes',
-                { error: err.message });
                 return cb(errors.InternalError);
             }
             if (!doc) {
@@ -190,9 +173,6 @@ class MongoClientInterface {
     getBucketAndObject(bucketName, objName, params, log, cb) {
         this.getBucketAttributes(bucketName, log, (err, bucket) => {
             if (err) {
-                log.error(
-                    'getBucketAttributes: error getting bucket attributes',
-                    { error: err.message });
                 return cb(err);
             }
             this.getObject(bucketName, objName, params, log, (err, obj) => {
@@ -203,8 +183,6 @@ class MongoClientInterface {
                                     BucketInfo.fromObj(bucket).serialize(),
                                   });
                     }
-                    log.error('getObject: error getting object',
-                    { error: err.message });
                     return cb(err);
                 }
                 return cb(null, {
@@ -242,13 +220,9 @@ class MongoClientInterface {
             _id: bucketName,
         }, {}, (err, result) => {
             if (err) {
-                log.error('deleteBucketStep2: error deleting bucket',
-                { error: err.message });
                 return cb(errors.InternalError);
             }
             if (result.ok !== 1) {
-                log.error('deleteBucketStep2: failed deleting bucket',
-                { error: err.message });
                 return cb(errors.InternalError);
             }
             return cb(null);
@@ -272,8 +246,6 @@ class MongoClientInterface {
                 if (err.codeName === 'NamespaceNotFound') {
                     return this.deleteBucketStep2(bucketName, log, cb);
                 }
-                log.error('deleteBucket: error deleting bucket',
-                { error: err.message });
                 return cb(errors.InternalError);
             }
             return this.deleteBucketStep2(bucketName, log, cb);
@@ -285,8 +257,6 @@ class MongoClientInterface {
      * sequentially create the object THEN update the master
      */
     putObjectVerCase1(c, bucketName, objName, objVal, params, log, cb) {
-        // TODO: if backbeat is doing a put, versionId should be pulled
-        // from existing metadata
         const versionId = generateVersionId(this.replicationGroupId);
         // eslint-disable-next-line
         objVal.versionId = versionId;
@@ -321,8 +291,6 @@ class MongoClientInterface {
      * have been created with versions
      */
     putObjectVerCase2(c, bucketName, objName, objVal, params, log, cb) {
-        // TODO: if backbeat is doing a put, versionId should be pulled
-        // from existing metadata
         const versionId = generateVersionId(this.replicationGroupId);
         // eslint-disable-next-line
         objVal.versionId = versionId;
@@ -383,15 +351,7 @@ class MongoClientInterface {
             value: objVal,
         }, {
             upsert: true,
-        }, err => {
-            if (err) {
-                log.error(
-                    'putObjectNoVer: error putting obect with no versioning',
-                    { error: err.message });
-                return cb(errors.InternalError);
-            }
-            return cb();
-        });
+        }, () => cb());
     }
 
     putObject(bucketName, objName, objVal, params, log, cb) {
@@ -421,8 +381,6 @@ class MongoClientInterface {
             _id: objName,
         }, {}, (err, doc) => {
             if (err) {
-                log.error('findOne: error getting object',
-                { error: err.message });
                 return cb(errors.InternalError);
             }
             if (!doc) {
@@ -431,8 +389,7 @@ class MongoClientInterface {
             if (doc.value.isPHD) {
                 this.getLatestVersion(c, objName, log, (err, value) => {
                     if (err) {
-                        log.error('getLatestVersion: getting latest version',
-                        { error: err.message });
+                        log.error('getting latest version', err);
                         return cb(err);
                     }
                     return cb(null, value);
@@ -461,9 +418,6 @@ class MongoClientInterface {
             toArray(
                 (err, keys) => {
                     if (err) {
-                        log.error(
-                            'getLatestVersion: error getting latest version',
-                            { error: err.message });
                         return cb(errors.InternalError);
                     }
                     if (keys.length === 0) {
@@ -493,13 +447,9 @@ class MongoClientInterface {
             upsert: true,
         }, (err, result) => {
             if (err) {
-                log.error('repair: error trying to repair value',
-                { error: err.message });
                 return cb(errors.InternalError);
             }
             if (result.ok !== 1) {
-                log.error('repair: failed trying to repair value',
-                { error: err.message });
                 return cb(errors.InternalError);
             }
             return cb(null);
@@ -513,13 +463,12 @@ class MongoClientInterface {
     asyncRepair(c, objName, mst, log) {
         this.getLatestVersion(c, objName, log, (err, value) => {
             if (err) {
-                log.error('async-repair: getting latest version',
-                { error: err.message });
+                log.error('async-repair: getting latest version', err);
                 return undefined;
             }
             this.repair(c, objName, value, mst, log, err => {
                 if (err) {
-                    log.error('async-repair failed', { error: err.message });
+                    log.error('async-repair failed', err);
                     return undefined;
                 }
                 log.debug('async-repair success');
@@ -550,9 +499,6 @@ class MongoClientInterface {
                         'value.versionId': mst.versionId,
                     }, {}, err => {
                         if (err) {
-                            log.error(
-                                'findOneAndDelete: error finding and deleting',
-                                { error: err.message });
                             return cb(errors.InternalError);
                         }
                         // do not test result.ok === 1 because
@@ -561,8 +507,6 @@ class MongoClientInterface {
                     });
                     return undefined;
                 }
-                log.error('getLatestVersion: error getting latest version',
-                { error: err.message });
                 return cb(err);
             }
             // We have other versions available so repair:
@@ -582,8 +526,6 @@ class MongoClientInterface {
      */
     deleteObjectVerMaster(c, bucketName, objName, params, log, cb) {
         const vObjName = formatVersionKey(objName, params.versionId);
-        // TODO: if backbeat is doing a delete, versionId should be pulled
-        // from existing metadata
         const _vid = generateVersionId(this.replicationGroupId);
         const mst = generatePHDVersion(_vid);
         c.bulkWrite([{
@@ -617,15 +559,9 @@ class MongoClientInterface {
             _id: vObjName,
         }, {}, (err, result) => {
             if (err) {
-                log.error(
-                    'findOneAndDelete: error when version is not master',
-                    { error: err.message });
                 return cb(errors.InternalError);
             }
             if (result.ok !== 1) {
-                log.error(
-                    'findOneAndDelete: failed when version is not master',
-                    { error: err.message });
                 return cb(errors.InternalError);
             }
             return cb(null);
@@ -643,8 +579,6 @@ class MongoClientInterface {
             _id: objName,
         }, {}, (err, mst) => {
             if (err) {
-                log.error('deleteObjectVer: error deleting versioned object',
-                { error: err.message });
                 return cb(errors.InternalError);
             }
             if (!mst) {
@@ -668,15 +602,9 @@ class MongoClientInterface {
             _id: objName,
         }, {}, (err, result) => {
             if (err) {
-                log.error(
-                    'deleteObjectNoVer: error deleting object with no version',
-                    { error: err.message });
                 return cb(errors.InternalError);
             }
             if (result.ok !== 1) {
-                log.error(
-                    'deleteObjectNoVer: failed deleting object with no version',
-                    { error: err.message });
                 return cb(errors.InternalError);
             }
             return cb(null);
@@ -699,8 +627,7 @@ class MongoClientInterface {
         const requestParams = extension.genMDParams();
         const c = this.getCollection(bucketName);
         let cbDone = false;
-        const stream = new MongoReadStream(c, requestParams,
-                                           params.mongifiedSearch);
+        const stream = new MongoReadStream(c, requestParams);
         stream
             .on('data', e => {
                 if (extension.filter(e) < 0) {
@@ -716,8 +643,7 @@ class MongoClientInterface {
                         error: err.message,
                         errorStack: err.stack,
                     };
-                    log.error(
-                        'internalListObject: error listing objects', logObj);
+                    log.error('error listing objects', logObj);
                     cb(errors.InternalError);
                 }
             })
@@ -745,8 +671,6 @@ class MongoClientInterface {
             _id: __UUID,
         }, {}, (err, doc) => {
             if (err) {
-                log.error('readUUID: error reading UUID',
-                { error: err.message });
                 return cb(errors.InternalError);
             }
             if (!doc) {
@@ -768,8 +692,6 @@ class MongoClientInterface {
                     // FIXME: define a KeyAlreadyExists error in Arsenal
                     return cb(errors.EntityAlreadyExists);
                 }
-                log.error('writeUUIDIfNotExists: error writing UUID',
-                { error: err.message });
                 return cb(errors.InternalError);
             }
             // FIXME: shoud we check for result.ok === 1 ?
@@ -786,8 +708,6 @@ class MongoClientInterface {
         this.writeUUIDIfNotExists(uuid, log, err => {
             if (err) {
                 if (err === errors.InternalError) {
-                    log.error('getUUID: error getting UUID',
-                    { error: err.message });
                     return cb(err);
                 }
                 return this.readUUID(log, cb);