Example usage for com.google.common.base Preconditions checkState

Introduction

In this page you can find the example usage for com.google.common.base Preconditions checkState.

Prototype

public static void checkState(boolean expression, @Nullable Object errorMessage)

Source Link

Document

Ensures the truth of an expression involving the state of the calling instance, but not involving any parameters to the calling method.

Usage

From source file:eu.lp0.cursus.db.DatabaseSession.java

void startSession() {
    Preconditions.checkState(THREADS.get() == null, "Session already open"); //$NON-NLS-1$
    synchronized (this) {
        Preconditions.checkState(emf.isOpen(), "Factory not open"); //$NON-NLS-1$
        openCount++;/*from   w w  w. j a va2 s . com*/
    }
    THREADS.set(emf.createEntityManager());
}

From source file:org.opendaylight.controller.config.manager.impl.osgi.mapping.BindingContextProvider.java

public synchronized BindingRuntimeContext getBindingContext() {
    Preconditions.checkState(this.current != null, "Binding context not yet initialized");
    return this.current;
}

From source file:annis.gui.converter.TreeSetConverter.java

@Override
public TreeSet convertToModel(Object value, Class<? extends TreeSet> targetType, Locale locale)
        throws ConversionException {
    TreeSet result = new TreeSet(CaseSensitiveOrder.INSTANCE);
    if (value instanceof Collection) {
        result.addAll((Collection) value);
        Preconditions.checkState(result.size() == ((Collection) value).size(),
                "Collection which was used with the TreeSetConverter had duplicate entries.");
    } else {//from w w  w.  j a  v  a  2  s.  c  o m
        result.add(value);
    }
    return result;
}

From source file:org.opendaylight.controller.cluster.datastore.TransactionRateLimitingCallback.java

@Override
public void run() {
    Preconditions.checkState(state == State.STOPPED, "state is not STOPPED");
    resume();
}

From source file:co.mitro.core.server.data.RPCLogger.java

public static synchronized void startLoggingWithPrefix(String prefix) throws IOException {
    Preconditions.checkNotNull(prefix);/*www  .  j  a  va 2  s  .  c o m*/
    Preconditions.checkState(RPCLogger.prefix == null, "RPCLogger already started");

    RPCLogger.prefix = prefix;
    // this thread runs as a daemon, so it doesn't stop the JVM from exiting
    rotator = new Timer(true);

    // run the log cycler immediately so that it can create the 1st log file. 
    rotator.schedule(new LogRotator(), 0, TimeUnit.HOURS.toMillis(LOG_TIME_HOURS));
}

From source file:com.github.jcustenborder.kafka.connect.utils.config.recommenders.EnumRecommender.java

EnumRecommender(Class<?> enumClass, VisibleCallback visible, String... excludes) {
    Preconditions.checkNotNull(enumClass, "enumClass cannot be null");
    Preconditions.checkState(enumClass.isEnum(), "enumClass must be an enum.");
    Preconditions.checkNotNull(visible, "visible cannot be null");
    this.enumClass = enumClass;
    this.visible = visible;
    Set<String> validEnums = new LinkedHashSet<>();
    for (Object o : enumClass.getEnumConstants()) {
        String key = o.toString();
        validEnums.add(key);//from ww  w  . j av a  2 s.c o m
    }
    validEnums.removeAll(Arrays.asList(excludes));
    this.validEnums = ImmutableSet.copyOf(validEnums);
}

From source file:org.apache.flume.source.AbstractSource.java

@Override
public synchronized void start() {
    Preconditions.checkState(channelProcessor != null, "No channel processor configured");

    lifecycleState = LifecycleState.START;
}

From source file:com.google.template.soy.jssrc.dsl.SwitchBuilder.java

/**
 * Adds a case clause (one or more {@code case} labels followed by a body) to this switch
 * statement./*from www .  j  av a 2 s .co m*/
 */
public SwitchBuilder case_(ImmutableList<CodeChunk.WithValue> caseLabels, CodeChunk body) {
    Preconditions.checkState(!caseLabels.isEmpty(), "at least one case required");
    clauses.add(new Switch.CaseClause(caseLabels, body));
    return this;
}

From source file:com.netflix.paas.cassandra.keys.KeyspaceKey.java

public KeyspaceKey(String schemaName) {
    String parts[] = StringUtils.split(schemaName, ".");
    Preconditions.checkState(parts.length == 2,
            String.format("Schema name must have format <cluster>.<keyspace> ('%s')", schemaName));

    this.clusterKey = new ClusterKey(parts[0], null); // TODO
    this.keyspaceName = parts[1];
    this.schemaName = schemaName;
}

From source file:model.utilities.stats.collectors.SalesData.java

/**
 * called when the data gathering is supposed to start. It schedules itself to start at next CLEANUP phase
 *//*from w w  w  .j av  a2s .  c om*/
public void start(MacroII state, SalesDepartment departmentToFollow) {
    if (!isActive())
        return;

    Preconditions.checkState(this.departmentToFollow == null, " can't start the gatherer twice!");

    //schedule yourself
    this.departmentToFollow = departmentToFollow;
    //we are going to set the starting day at -1 and then change it at our first step()
    setStartingDay(-1);

    state.scheduleSoon(ActionOrder.CLEANUP_DATA_GATHERING, this);
}