argeo/server/ServerAnswer.java

   1 package org.argeo.server;
   2
   3 import java.io.PrintWriter;
   4 import java.io.StringWriter;
   5
   6 import org.apache.commons.io.IOUtils;
   7 import org.argeo.ArgeoException;
   8
   9 /** Answer to an execution of a remote service which performed changes. */
  10 public class ServerAnswer {
  11         public final static String OK = "OK";
  12         public final static String ERROR = "ERROR";
  13
  14         private String status = OK;
  15         private String message = "";
  16
  17         /** Canonical constructor */
  18         public ServerAnswer(String status, String message) {
  19                 setStatus(status);
  20                 if (message == null)
  21                         throw new ArgeoException("Message cannot be null");
  22                 this.message = message;
  23         }
  24
  25         /** Empty constructor */
  26         public ServerAnswer() {
  27         }
  28
  29         public String getStatus() {
  30                 return status;
  31         }
  32
  33         public void setStatus(String status) {
  34                 if (status == null || (!status.equals(OK) && !status.equals(ERROR)))
  35                         throw new ArgeoException("Bad status format: " + status);
  36                 this.status = status;
  37         }
  38
  39         public String getMessage() {
  40                 return message;
  41         }
  42
  43         public void setMessage(String message) {
  44                 this.message = message;
  45         }
  46
  47         public Boolean isOk() {
  48                 return status.equals(OK);
  49         }
  50
  51         public Boolean isError() {
  52                 return status.equals(ERROR);
  53         }
  54
  55         public static ServerAnswer error(String message) {
  56                 return new ServerAnswer(ERROR, message);
  57         }
  58
  59         public static ServerAnswer error(Throwable e) {
  60                 StringWriter writer = new StringWriter();
  61                 try {
  62                         e.printStackTrace(new PrintWriter(writer));
  63                         return new ServerAnswer(ERROR, writer.toString());
  64                 } finally {
  65                         IOUtils.closeQuietly(writer);
  66                 }
  67         }
  68
  69         public static ServerAnswer ok(String message) {
  70                 return new ServerAnswer(OK, message);
  71         }
  72
  73         @Override
  74         public String toString() {
  75                 return "ServerAnswer{status:" + status + ", message:" + message + "}";
  76         }
  77
  78 }