Examples of com.mongodb.MongoClient

com.mongodb.MongoClient
ongodb.org/display/DOCS/Replica+Sets">replica set using the Java driver by passing a ServerAddress list to the MongoClient constructor. For example:
```
 MongoClient mongoClient = new MongoClient(Arrays.asList( new ServerAddress("localhost", 27017), new ServerAddress("localhost", 27018), new ServerAddress("localhost", 27019))); 
```
You can connect to a sharded cluster using the same constructor. MongoClient will auto-detect whether the servers are a list of replica set members or a list of mongos servers.

By default, all read and write operations will be made on the primary, but it's possible to read from secondaries by changing the read preference:
```
 mongoClient.setReadPreference(ReadPreference.secondaryPreferred()); 
```
By default, all write operations will wait for acknowledgment by the server, as the default write concern is {@code WriteConcern.ACKNOWLEDGED}.

Note: This class supersedes the {@code Mongo} class. While it extends {@code Mongo}, it differs from it in that the default write concern is to wait for acknowledgment from the server of all write operations. In addition, its constructors accept instances of {@code MongoClientOptions} and {@code MongoClientURI}, which both also set the same default write concern.

In general, users of this class will pick up all of the default options specified in {@code MongoClientOptions}. In particular, note that the default value of the connectionsPerHost option has been increased to 100 from the old default value of 10 used by the superseded {@code Mongo} class.
@see ReadPreference#primary() @see com.mongodb.WriteConcern#ACKNOWLEDGED @see MongoClientOptions @see MongoClientURI @since 2.10.0

            logger.info("Starting Document{} with host={}, db={}, cache size (MB)={}, Off Heap Cache size (MB)={}",
                    new Object[] {type, mongoURI.getHosts(), db, cacheSize, offHeapCache});
            logger.info("Mongo Connection details {}", MongoConnection.toString(mongoURI.getOptions()));
        }


        MongoClient client = new MongoClient(mongoURI);
        DB mongoDB = client.getDB(db);


        // Check if any valid external BlobStore is defined.
        // If not then use the default which is MongoBlobStore
        BlobStore blobStore = null;
        if (Strings.isNullOrEmpty(blobStoreType)) {

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    public OakSegmentMKRepositoryStub(Properties settings) throws RepositoryException {
        super(settings);


        Session session = null;
        try {
            this.connection = new MongoClient(HOST, PORT);
            Jcr jcr = new Jcr(new Oak(new SegmentNodeStore(
                    new MongoStore(connection.getDB(DB), 4))));
            this.repository = jcr.createRepository();


            session = getRepository().login(superuser);

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        }));
    }


    public static boolean isAvailable() {
        try {
            MongoClient mongo = new MongoClient(HOST, PORT);
            try {
                mongo.getDatabaseNames();
                return true;
            } finally {
                mongo.close();
            }
        } catch (Exception e) {
            return false;
        }
    }

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            private MongoClient mongo;
            @Override
            protected Repository[] internalSetUpCluster(int n) throws Exception {
                Repository[] cluster = new Repository[n];
                stores = new SegmentStore[cluster.length];
                mongo = new MongoClient(host, port);
                for (int i = 0; i < cluster.length; i++) {
                    stores[i] = new MongoStore(mongo.getDB(unique), cacheSizeMB);
                    Oak oak = new Oak(new SegmentNodeStore(stores[i]));
                    cluster[i] = new Jcr(oak).createRepository();
                }

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     * @throws UnknownHostException
     */
    public MongoConnection(String uri) throws UnknownHostException  {
        MongoClientOptions.Builder builder = MongoConnection.getDefaultBuilder();
        MongoClientURI mongoURI = new MongoClientURI(uri, builder);
        mongo = new MongoClient(mongoURI);
        db = mongo.getDB(mongoURI.getDatabase());
    }

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    private Mongo mongo = null;


    public MongoDB(
            List<ServerAddress> serverAddresses,
            MongoClientOptions mongoOptions) {
        mongo = new MongoClient(serverAddresses, mongoOptions);   
    }

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            RepositoryContext source =
                    RepositoryContext.create(RepositoryConfig.create(dir, xml));
            try {
                if (dst.startsWith("mongodb://")) {
                    MongoClientURI uri = new MongoClientURI(dst);
                    MongoClient client = new MongoClient(uri);
                    try {
                        DocumentNodeStore target = new DocumentMK.Builder()
                            .setMongoDB(client.getDB(uri.getDatabase()))
                            .getNodeStore();
                        try {
                            RepositoryUpgrade upgrade =
                                    new RepositoryUpgrade(source, target);
                            upgrade.setCopyBinariesByReference(
                                    options.has("datastore"));
                            upgrade.copy(null);
                        } finally {
                            target.dispose();
                        }
                    } finally {
                        client.close();
                    }
                } else {
                    FileStore store = new FileStore(new File(dst), 256);
                    try {
                        NodeStore target = new SegmentNodeStore(store);

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            log.info("Starting Document{} with host={}, db={}, cache size (MB)={}, Off Heap Cache size (MB)={}, 'changes' collection size (MB)={}",
                    type, mongoURI.getHosts(), db, cacheSize, offHeapCache, changesSize);
            log.info("Mongo Connection details {}", MongoConnection.toString(mongoURI.getOptions()));
        }


        MongoClient client = new MongoClient(mongoURI);
        DB mongoDB = client.getDB(db);


        DocumentMK.Builder mkBuilder =
                new DocumentMK.Builder().
                memoryCacheSize(cacheSize * MB).
                offHeapCacheSize(offHeapCache * MB);

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            RepositoryContext source =
                    RepositoryContext.create(RepositoryConfig.create(dir, xml));
            try {
                if (dst.startsWith("mongodb://")) {
                    MongoClientURI uri = new MongoClientURI(dst);
                    MongoClient client = new MongoClient(uri);
                    try {
                        DocumentNodeStore target = new DocumentMK.Builder()
                            .setMongoDB(client.getDB(uri.getDatabase()))
                            .getNodeStore();
                        try {
                            RepositoryUpgrade upgrade =
                                    new RepositoryUpgrade(source, target);
                            upgrade.setCopyBinariesByReference(
                                    options.has("datastore"));
                            upgrade.copy();
                        } finally {
                            target.dispose();
                        }
                    } finally {
                        client.close();
                    }
                } else {
                    FileStore store = new FileStore(new File(dst), 256);
                    try {
                        NodeStore target = new SegmentNodeStore(store);

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            private MongoClient mongo;
            @Override
            protected Repository[] internalSetUpCluster(int n) throws Exception {
                Repository[] cluster = new Repository[n];
                stores = new SegmentStore[cluster.length];
                mongo = new MongoClient(host, port);
                for (int i = 0; i < cluster.length; i++) {
                    stores[i] = new MongoStore(mongo.getDB(unique), cacheSizeMB);
                    Oak oak = new Oak(new SegmentNodeStore(stores[i]));
                    cluster[i] = new Jcr(oak).createRepository();
                }

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