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This is a non-standard protocol for higher efficiency than SOAP, used by the base UIMA Collection processing manager for supporting networked deployment. See UIMA-AS as a more modern alternative supporting more standard protocols.

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.vinci.transport;

/**
 * This class contains all frame related constants used by the Vinci transport layer.
 */
public class TransportConstants {
  /**
   * Class not to be instantiated.
   */
  private TransportConstants() {
  }

  public static final String VINCI_NAMESPACE = "vinci:";

  public static final String VINCI_NAMESPACE_URI = "http://uima.apache.org/vinci/FrameSpec/";

  // ^^ This transport library naively assumes that the Vinci namepsace is ALWAYS
  // indicated by the "vinci:" tag prefix, even though XML requires the namespace
  // be defined by the prefix "xmlns" definition.

  public static final String PCDATA_KEY = "";

  public static final String ERROR_KEY = VINCI_NAMESPACE + "ERROR";

  public static final String COMMAND_KEY = VINCI_NAMESPACE + "COMMAND";

  public static final String SHUTDOWN_KEY = VINCI_NAMESPACE + "SHUTDOWN";

  public static final String PING_KEY = VINCI_NAMESPACE + "PING";

  public static final String STATUS_KEY = VINCI_NAMESPACE + "STATUS";

  public static final String TRUE_VALUE = "true";

  public static final String FALSE_VALUE = "false";

  public static final String OK_VALUE = "ok";
}