Java Code Examples for com.thinkaurelius.titan.core.schema.TitanManagement#rollback()

public SchemaContainer(TitanGraph graph) {
    vertexLabels = Maps.newHashMap();
    relationTypes = Maps.newHashMap();
    TitanManagement mgmt = graph.openManagement();

    try {
        for (VertexLabel vl : mgmt.getVertexLabels()) {
            VertexLabelDefinition vld = new VertexLabelDefinition(vl);
            vertexLabels.put(vld.getName(),vld);
        }

        for (EdgeLabel el : mgmt.getRelationTypes(EdgeLabel.class)) {
            EdgeLabelDefinition eld = new EdgeLabelDefinition(el);
            relationTypes.put(eld.getName(),eld);
        }
        for (PropertyKey pk : mgmt.getRelationTypes(PropertyKey.class)) {
            PropertyKeyDefinition pkd = new PropertyKeyDefinition(pk);
            relationTypes.put(pkd.getName(), pkd);
        }
    } finally {
        mgmt.rollback();
    }

}
 

public Titan1Graph() {
    //determine multi-properties once at startup
    TitanManagement mgmt = null;
    try {
        mgmt = Titan1GraphDatabase.getGraphInstance().openManagement();
        Iterable<PropertyKey> keys = mgmt.getRelationTypes(PropertyKey.class);
        multiProperties = new HashSet<>();
        for (PropertyKey key : keys) {
            if (key.cardinality() != Cardinality.SINGLE) {
                multiProperties.add(key.name());
            }
        }
    } finally {
        if (mgmt != null) {
            mgmt.rollback();
        }
    }
}
 

public Titan0Graph() {
    //determine multi-properties once at startup
    TitanManagement mgmt = null;
    try {
        mgmt = Titan0GraphDatabase.getGraphInstance().getManagementSystem();
        Iterable<PropertyKey> keys = mgmt.getRelationTypes(PropertyKey.class);
        multiProperties = Collections.synchronizedSet(new HashSet<String>());
        for(PropertyKey key : keys) {
            if (key.getCardinality() != Cardinality.SINGLE) {
                multiProperties.add(key.getName());
            }
        }
    } finally {
        if (mgmt != null) {
            mgmt.rollback();
        }
    }
}
 

/**
 * Poll a relation index until it has a certain {@link SchemaStatus},
 * or until a configurable timeout is exceeded.
 *
 * @return a report with information about schema state, execution duration, and the index
 */
@Override
public RelationIndexStatusReport call() throws InterruptedException {
    Preconditions.checkNotNull(g, "Graph instance must not be null");
    Preconditions.checkNotNull(relationIndexName, "Index name must not be null");
    Preconditions.checkNotNull(status, "Target status must not be null");

    RelationTypeIndex idx;

    Timer t = new Timer(TimestampProviders.MILLI).start();
    boolean timedOut;
    while (true) {
        SchemaStatus actualStatus = null;
        TitanManagement mgmt = null;
        try {
            mgmt = g.openManagement();
            idx = mgmt.getRelationIndex(mgmt.getRelationType(relationTypeName), relationIndexName);
            actualStatus = idx.getIndexStatus();
            LOGGER.info("Index {} (relation type {}) has status {}", relationIndexName, relationTypeName, actualStatus);
            if (status.equals(actualStatus)) {
                return new RelationIndexStatusReport(true, relationIndexName, relationTypeName, actualStatus, status, t.elapsed());
            }
        } finally {
            if (null != mgmt)
                mgmt.rollback(); // Let an exception here propagate up the stack
        }

        timedOut = null != timeout && 0 < t.elapsed().compareTo(timeout);

        if (timedOut) {
            LOGGER.info("Timed out ({}) while waiting for index {} (relation type {}) to reach status {}",
                    timeout, relationIndexName, relationTypeName, status);
            return new RelationIndexStatusReport(false, relationIndexName, relationTypeName, actualStatus, status, t.elapsed());
        }

        Thread.sleep(poll.toMillis());
    }
}
 

@Override
public GraphIndexStatusReport call() throws InterruptedException {
    Preconditions.checkNotNull(g, "Graph instance must not be null");
    Preconditions.checkNotNull(graphIndexName, "Index name must not be null");
    Preconditions.checkNotNull(status, "Target status must not be null");

    Map<String, SchemaStatus> notConverged = new HashMap<>();
    Map<String, SchemaStatus> converged = new HashMap<>();
    TitanGraphIndex idx;

    Timer t = new Timer(TimestampProviders.MILLI).start();
    boolean timedOut;
    while (true) {
        TitanManagement mgmt = null;
        try {
            mgmt = g.openManagement();
            idx = mgmt.getGraphIndex(graphIndexName);
            for (PropertyKey pk : idx.getFieldKeys()) {
                SchemaStatus s = idx.getIndexStatus(pk);
                LOGGER.debug("Key {} has status {}", pk, s);
                if (!status.equals(s))
                    notConverged.put(pk.toString(), s);
                else
                    converged.put(pk.toString(), s);
            }
        } finally {
            if (null != mgmt)
                mgmt.rollback(); // Let an exception here propagate up the stack
        }

        String waitingOn = Joiner.on(",").withKeyValueSeparator("=").join(notConverged);
        if (!notConverged.isEmpty()) {
            LOGGER.info("Some key(s) on index {} do not currently have status {}: {}", graphIndexName, status, waitingOn);
        } else {
            LOGGER.info("All {} key(s) on index {} have status {}", converged.size(), graphIndexName, status);
            return new GraphIndexStatusReport(true, graphIndexName, status, notConverged, converged, t.elapsed());
        }

        timedOut = null != timeout && 0 < t.elapsed().compareTo(timeout);

        if (timedOut) {
            LOGGER.info("Timed out ({}) while waiting for index {} to converge on status {}",
                    timeout, graphIndexName, status);
            return new GraphIndexStatusReport(false, graphIndexName, status, notConverged, converged, t.elapsed());
        }
        notConverged.clear();
        converged.clear();

        Thread.sleep(poll.toMillis());
    }
}