From d261a5ec861c001f0331e36e01499d8dde7f5c67 Mon Sep 17 00:00:00 2001
From: Peter Mount <peter@retep.org.uk>
Date: Tue, 18 May 1999 06:07:25 +0000
Subject: [PATCH] Transactions in ImageViewer
---
src/interfaces/jdbc/CHANGELOG | 3 +++
src/interfaces/jdbc/example/ImageViewer.java | 7 +++++++
2 files changed, 10 insertions(+)
diff --git a/src/interfaces/jdbc/CHANGELOG b/src/interfaces/jdbc/CHANGELOG
index 130ecb29fff..29b834bfeb8 100644
--- a/src/interfaces/jdbc/CHANGELOG
+++ b/src/interfaces/jdbc/CHANGELOG
@@ -1,3 +1,6 @@
+Tue May 18 07:00:00 BST 1999
+ - Set the ImageViewer application to use transactions
+
Tue May 18 00:00:00 BST 1999
- Just after committing, I realised why internationalisation isn't
working. This is now fixed (in the Makefile).
diff --git a/src/interfaces/jdbc/example/ImageViewer.java b/src/interfaces/jdbc/example/ImageViewer.java
index 8f6f4c5e68f..56166807d70 100644
--- a/src/interfaces/jdbc/example/ImageViewer.java
+++ b/src/interfaces/jdbc/example/ImageViewer.java
@@ -192,6 +192,9 @@ public class ImageViewer implements ItemListener
// Create a statement
stat = db.createStatement();
+ // Set the connection to use transactions
+ db.setAutoCommit(false);
+
// Also, get the LargeObjectManager for this connection
lom = ((postgresql.Connection)db).getLargeObjectAPI();
@@ -209,6 +212,7 @@ public class ImageViewer implements ItemListener
try {
stat.executeUpdate("create table images (imgname name,imgoid oid)");
label.setText("Initialised database");
+ db.commit();
} catch(SQLException ex) {
label.setText(ex.toString());
}
@@ -310,6 +314,7 @@ public class ImageViewer implements ItemListener
// our own thread
stat = db.createStatement();
stat.executeUpdate("insert into images values ('"+name+"',"+oid+")");
+ db.commit();
// Finally refresh the names list, and display the current image
ImageViewer.this.refreshList();
@@ -372,9 +377,11 @@ public class ImageViewer implements ItemListener
// Finally delete any entries for that name
stat.executeUpdate("delete from images where imgname='"+currentImage+"'");
+ db.commit();
label.setText(currentImage+" deleted");
currentImage=null;
+ db.commit();
refreshList();
} catch(SQLException ex) {
label.setText(ex.toString());
--
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