Example usage for com.mongodb ReadPreference primaryPreferred

Introduction

In this page you can find the example usage for com.mongodb ReadPreference primaryPreferred.

Prototype

public static ReadPreference primaryPreferred() 

Source Link

Document

Gets a read preference that forces reads to the primary if available, otherwise to a secondary.

Usage

From source file:org.hbr.session.store.MongoStore.java

License:Apache License

/**
 * Create the {@link MongoClient}.//from   w w w .  j  a  v a  2s .  c o  m
 * @throws LifecycleException
 */
private void getConnection() throws LifecycleException {
    try {
        /* create our MongoClient */
        if (this.connectionUri != null) {
            manager.getContainer().getLogger().info(getStoreName() + "[" + this.getName()
                    + "]: Connecting to MongoDB [" + this.connectionUri + "]");
            this.mongoClient = new MongoClient(this.connectionUri);
        } else {
            /* create the client using the Mongo options */
            ReadPreference readPreference = ReadPreference.primaryPreferred();
            if (this.useSlaves) {
                readPreference = ReadPreference.secondaryPreferred();
            }
            MongoClientOptions options = MongoClientOptions.builder().connectTimeout(connectionTimeoutMs)
                    .maxWaitTime(connectionWaitTimeoutMs).connectionsPerHost(maxPoolSize)
                    .writeConcern(writeConcern).readPreference(readPreference).build();

            /* build up the host list */
            List<ServerAddress> hosts = new ArrayList<ServerAddress>();
            String[] dbHosts = this.hosts.split(",");
            for (String dbHost : dbHosts) {
                String[] hostInfo = dbHost.split(":");
                ServerAddress address = new ServerAddress(hostInfo[0], Integer.parseInt(hostInfo[1]));
                hosts.add(address);
            }

            this.manager.getContainer().getLogger().info(
                    getStoreName() + "[" + this.getName() + "]: Connecting to MongoDB [" + this.hosts + "]");

            /* connect */
            this.mongoClient = new MongoClient(hosts, options);
        }

        /* get a connection to our db */
        this.manager.getContainer().getLogger()
                .info(getStoreName() + "[" + this.getName() + "]: Using Database [" + this.dbName + "]");
        this.db = this.mongoClient.getDB(this.dbName);

        /* see if we need to authenticate */
        if (this.username != null || this.password != null) {
            this.manager.getContainer().getLogger().info(
                    getStoreName() + "[" + this.getName() + "]: Authenticating using [" + this.username + "]");
            if (!this.db.authenticate(this.username, this.password.toCharArray())) {
                throw new RuntimeException("MongoDB Authentication Failed");
            }
        }

        /* get a reference to the collection */
        this.collection = this.db.getCollection(this.collectionName);
        this.manager.getContainer().getLogger()
                .info(getStoreName() + "[" + this.getName() + "]: Preparing indexes");

        /* drop any existing indexes */
        try {
            this.collection.dropIndex(new BasicDBObject(lastModifiedProperty, 1));
            this.collection.dropIndex(new BasicDBObject(appContextProperty, 1));
        } catch (Exception e) {
            /* these indexes may not exist, so ignore */
        }

        /* make sure the last modified and app name indexes exists */
        this.collection.ensureIndex(new BasicDBObject(appContextProperty, 1));

        /* determine if we need to expire our db sessions */
        if (this.timeToLive != -1) {
            /* use the time to live set */
            this.collection.ensureIndex(new BasicDBObject(lastModifiedProperty, 1),
                    new BasicDBObject("lastModifiedProperty", this.timeToLive));
        } else {
            /* no custom time to live specified, use the manager's settings */
            if (this.manager.getMaxInactiveInterval() != -1) {
                /* create a ttl index on the app property */
                this.collection.ensureIndex(new BasicDBObject(lastModifiedProperty, 1),
                        new BasicDBObject("lastModifiedProperty", this.manager.getMaxInactiveInterval()));
            } else {
                /* create a regular index */
                this.collection.ensureIndex(new BasicDBObject(lastModifiedProperty, 1));
            }
        }

        this.manager.getContainer().getLogger().info(getStoreName() + "[" + this.getName() + "]: Store ready.");
    } catch (UnknownHostException uhe) {
        this.manager.getContainer().getLogger().error("Unable to Connect to MongoDB", uhe);
        throw new LifecycleException(uhe);
    } catch (MongoException me) {
        this.manager.getContainer().getLogger().error("Unable to Connect to MongoDB", me);
        throw new LifecycleException(me);
    }
}

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From source file:org.springframework.data.mongodb.config.ReadPreferencePropertyEditor.java

License:Apache License

@Override
public void setAsText(String readPreferenceString) throws IllegalArgumentException {

    if (readPreferenceString == null) {
        return;/* ww w .  j av  a  2 s .c  o  m*/
    }

    ReadPreference preference = null;

    try {
        preference = ReadPreference.valueOf(readPreferenceString);
    } catch (IllegalArgumentException ex) {
        // ignore this one and try to map it differently
    }

    if (preference != null) {
        setValue(preference);
    } else if ("PRIMARY".equalsIgnoreCase(readPreferenceString)) {
        setValue(ReadPreference.primary());
    } else if ("PRIMARY_PREFERRED".equalsIgnoreCase(readPreferenceString)) {
        setValue(ReadPreference.primaryPreferred());
    } else if ("SECONDARY".equalsIgnoreCase(readPreferenceString)) {
        setValue(ReadPreference.secondary());
    } else if ("SECONDARY_PREFERRED".equalsIgnoreCase(readPreferenceString)) {
        setValue(ReadPreference.secondaryPreferred());
    } else if ("NEAREST".equalsIgnoreCase(readPreferenceString)) {
        setValue(ReadPreference.nearest());
    } else {
        throw new IllegalArgumentException(
                String.format("Cannot find matching ReadPreference for %s", readPreferenceString));
    }
}

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From source file:org.unitedid.shibboleth.attribute.resolver.provider.dataConnector.MongoDbDataConnector.java

License:Apache License

/**
 * Gets preferred read method for MongoDB.
 * Defaults to primaryPreferred.//from  w w w  .j a v  a2s.  co m
 *
 * @return a ReadPreference
 */
public ReadPreference getPreferredRead() {
    if (preferredRead != null && !preferredRead.isEmpty()) {
        return MONGO_READ_PREF.get(preferredRead);
    }
    return ReadPreference.primaryPreferred();
}

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