Example usage for org.apache.cassandra.transport.messages StartupMessage CQL_VERSION

Introduction

In this page you can find the example usage for org.apache.cassandra.transport.messages StartupMessage CQL_VERSION.

Prototype

String CQL_VERSION

To view the source code for org.apache.cassandra.transport.messages StartupMessage CQL_VERSION.

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Usage

From source file:com.datastax.driver.core.Connection.java

License:Apache License

private void initializeTransport() throws ConnectionException, InterruptedException {

    // TODO: we will need to get fancy about handling protocol version at
    // some point, but keep it simple for now.
    ImmutableMap.Builder<String, String> options = new ImmutableMap.Builder<String, String>();
    options.put(StartupMessage.CQL_VERSION, CQL_VERSION);
    ProtocolOptions.Compression compression = factory.configuration.getProtocolOptions().getCompression();
    if (compression != ProtocolOptions.Compression.NONE) {
        options.put(StartupMessage.COMPRESSION, compression.toString());
        setCompressor(compression.compressor());
    }/*ww  w.ja  v a  2  s  .c  o m*/
    StartupMessage startup = new StartupMessage(options.build());
    try {
        Message.Response response = write(startup).get();
        switch (response.type) {
        case READY:
            break;
        case ERROR:
            throw defunct(new TransportException(address, String.format("Error initializing connection: %s",
                    ((ErrorMessage) response).error.getMessage())));
        case AUTHENTICATE:
            CredentialsMessage creds = new CredentialsMessage();
            creds.credentials.putAll(factory.authProvider.getAuthInfo(address));
            Message.Response authResponse = write(creds).get();
            switch (authResponse.type) {
            case READY:
                break;
            case ERROR:
                throw new AuthenticationException(address, (((ErrorMessage) authResponse).error).getMessage());
            default:
                throw defunct(new TransportException(address,
                        String.format("Unexpected %s response message from server to a CREDENTIALS message",
                                authResponse.type)));
            }
            break;
        default:
            throw defunct(new TransportException(address, String
                    .format("Unexpected %s response message from server to a STARTUP message", response.type)));
        }
    } catch (BusyConnectionException e) {
        throw new DriverInternalError("Newly created connection should not be busy");
    } catch (ExecutionException e) {
        throw defunct(new ConnectionException(address,
                String.format("Unexpected error during transport initialization (%s)", e.getCause()),
                e.getCause()));
    }
}

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