pekko/akka-docs/java/code/akka/docs/actor/ImmutableMessage.java

package akka.docs.actor;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

//#immutable-message
public class ImmutableMessage {
  private final int sequenceNumber;
  private final List<String> values;

  public ImmutableMessage(int sequenceNumber, List<String> values) {
    this.sequenceNumber = sequenceNumber;
    this.values = Collections.unmodifiableList(new ArrayList<String>(values));
  }

  public int getSequenceNumber() {
    return sequenceNumber;
  }

  public List<String> getValues() {
    return values;
  }
}
//#immutable-message