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// Generated by the protocol buffer compiler.  DO NOT EDIT!
// source: apache/rocketmq/v2/definition.proto

package apache.rocketmq.v2;

public interface MessageOrBuilder extends
    // @@protoc_insertion_point(interface_extends:apache.rocketmq.v2.Message)
    org.apache.rocketmq.shaded.com.google.protobuf.MessageOrBuilder {

  /**
   * .apache.rocketmq.v2.Resource topic = 1;
   * @return Whether the topic field is set.
   */
  boolean hasTopic();
  /**
   * .apache.rocketmq.v2.Resource topic = 1;
   * @return The topic.
   */
  apache.rocketmq.v2.Resource getTopic();
  /**
   * .apache.rocketmq.v2.Resource topic = 1;
   */
  apache.rocketmq.v2.ResourceOrBuilder getTopicOrBuilder();

  /**
   *    * User defined key-value pairs.
   * If user_properties contain the reserved keys by RocketMQ,
   * the send message request will be aborted with status `INVALID_ARGUMENT`.
   * See below links for the reserved keys
   * https://github.com/apache/rocketmq/blob/master/common/src/main/java/org/apache/rocketmq/common/message/MessageConst.java#L58
   * 
   *
   * map<string, string> user_properties = 2;
   */
  int getUserPropertiesCount();
  /**
   *    * User defined key-value pairs.
   * If user_properties contain the reserved keys by RocketMQ,
   * the send message request will be aborted with status `INVALID_ARGUMENT`.
   * See below links for the reserved keys
   * https://github.com/apache/rocketmq/blob/master/common/src/main/java/org/apache/rocketmq/common/message/MessageConst.java#L58
   * 
   *
   * map<string, string> user_properties = 2;
   */
  boolean containsUserProperties(
      java.lang.String key);
  /**
   * Use {@link #getUserPropertiesMap()} instead.
   */
  @java.lang.Deprecated
  java.util.Map
  getUserProperties();
  /**
   *    * User defined key-value pairs.
   * If user_properties contain the reserved keys by RocketMQ,
   * the send message request will be aborted with status `INVALID_ARGUMENT`.
   * See below links for the reserved keys
   * https://github.com/apache/rocketmq/blob/master/common/src/main/java/org/apache/rocketmq/common/message/MessageConst.java#L58
   * 
   *
   * map<string, string> user_properties = 2;
   */
  java.util.Map
  getUserPropertiesMap();
  /**
   *    * User defined key-value pairs.
   * If user_properties contain the reserved keys by RocketMQ,
   * the send message request will be aborted with status `INVALID_ARGUMENT`.
   * See below links for the reserved keys
   * https://github.com/apache/rocketmq/blob/master/common/src/main/java/org/apache/rocketmq/common/message/MessageConst.java#L58
   * 
   *
   * map<string, string> user_properties = 2;
   */

  /* nullable */
java.lang.String getUserPropertiesOrDefault(
      java.lang.String key,
      /* nullable */
java.lang.String defaultValue);
  /**
   *    * User defined key-value pairs.
   * If user_properties contain the reserved keys by RocketMQ,
   * the send message request will be aborted with status `INVALID_ARGUMENT`.
   * See below links for the reserved keys
   * https://github.com/apache/rocketmq/blob/master/common/src/main/java/org/apache/rocketmq/common/message/MessageConst.java#L58
   * 
   *
   * map<string, string> user_properties = 2;
   */

  java.lang.String getUserPropertiesOrThrow(
      java.lang.String key);

  /**
   * .apache.rocketmq.v2.SystemProperties system_properties = 3;
   * @return Whether the systemProperties field is set.
   */
  boolean hasSystemProperties();
  /**
   * .apache.rocketmq.v2.SystemProperties system_properties = 3;
   * @return The systemProperties.
   */
  apache.rocketmq.v2.SystemProperties getSystemProperties();
  /**
   * .apache.rocketmq.v2.SystemProperties system_properties = 3;
   */
  apache.rocketmq.v2.SystemPropertiesOrBuilder getSystemPropertiesOrBuilder();

  /**
   * bytes body = 4;
   * @return The body.
   */
  org.apache.rocketmq.shaded.com.google.protobuf.ByteString getBody();
}