GUACAMOLE-52: Foreign keys in history table should be ON DELETE SET NULL. For sake of context, always store username and connection name in history table.

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/apache/guacamole/auth/jdbc/tunnel/AbstractGuacamoleTunnelService.java

@@ -246,13 +246,12 @@ public abstract class AbstractGuacamoleTunnelService implements GuacamoleTunnelS
         
         // Get associated models
         AuthenticatedUser user = record.getUser();
-        UserModel userModel = user.getUser().getModel();
         ConnectionRecordModel recordModel = new ConnectionRecordModel();
 
         // Copy user information and timestamps into new record
-        recordModel.setUserID(userModel.getObjectID());
+        recordModel.setUsername(user.getIdentifier());
-        recordModel.setUsername(userModel.getIdentifier());
         recordModel.setConnectionIdentifier(connection.getIdentifier());
+        recordModel.setConnectionName(connection.getName());
         recordModel.setStartDate(record.getStartDate());
         recordModel.setEndDate(new Date());
 

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-mysql/schema/001-create-schema.sql

@@ -230,11 +230,13 @@ CREATE TABLE `guacamole_user_permission` (
 
 CREATE TABLE `guacamole_connection_history` (
 
-  `history_id`    int(11)  NOT NULL AUTO_INCREMENT,
+  `history_id`      int(11)  NOT NULL AUTO_INCREMENT,
-  `user_id`       int(11)  NOT NULL,
+  `user_id`         int(11)  DEFAULT NULL,
-  `connection_id` int(11)  NOT NULL,
+  `username`        varchar(128) NOT NULL,
-  `start_date`    datetime NOT NULL,
+  `connection_id`   int(11)  DEFAULT NULL,
-  `end_date`      datetime DEFAULT NULL,
+  `connection_name` varchar(128) NOT NULL,
+  `start_date`      datetime NOT NULL,
+  `end_date`        datetime DEFAULT NULL,
 
   PRIMARY KEY (`history_id`),
   KEY `user_id` (`user_id`),

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-mysql/schema/upgrade/upgrade-pre-0.9.10.sql

@@ -0,0 +1,89 @@
+--
+-- 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.
+--
+
+--
+-- User and connection IDs within history table can now be null
+--
+
+ALTER TABLE guacamole_connection_history
+    MODIFY COLUMN user_id INT(11) DEFAULT NULL;
+
+ALTER TABLE guacamole_connection_history
+    MODIFY COLUMN connection_id INT(11) DEFAULT NULL;
+
+--
+-- Add new username and connection_name columns to history table
+--
+
+ALTER TABLE guacamole_connection_history
+    ADD COLUMN username VARCHAR(128);
+
+ALTER TABLE guacamole_connection_history
+    ADD COLUMN connection_name VARCHAR(128);
+
+--
+-- Populate new name columns by joining corresponding tables
+--
+
+UPDATE guacamole_connection_history
+JOIN guacamole_user
+    ON guacamole_user.user_id = guacamole_connection_history.user_id
+SET guacamole_connection_history.username = guacamole_user.username;
+
+UPDATE guacamole_connection_history
+JOIN guacamole_connection
+    ON guacamole_connection.connection_id =
+        guacamole_connection_history.connection_id
+SET guacamole_connection_history.connection_name =
+    guacamole_connection.connection_name;
+
+--
+-- Set NOT NULL now that the column is fully populated
+--
+
+ALTER TABLE guacamole_connection_history
+    MODIFY username VARCHAR(128) NOT NULL;
+
+ALTER TABLE guacamole_connection_history
+    MODIFY connection_name VARCHAR(128) NOT NULL;
+
+--
+-- Remove old foreign key constraints with ON DELETE CASCADE
+--
+
+ALTER TABLE guacamole_connection_history
+    DROP FOREIGN KEY guacamole_connection_history_ibfk_1;
+
+ALTER TABLE guacamole_connection_history
+    DROP FOREIGN KEY guacamole_connection_history_ibfk_2;
+
+--
+-- Recreate foreign key constraints with ON DELETE SET NULL
+--
+
+ALTER TABLE guacamole_connection_history
+    ADD CONSTRAINT guacamole_connection_history_ibfk_1
+    FOREIGN KEY (user_id)
+    REFERENCES guacamole_user (user_id) ON DELETE SET NULL;
+
+ALTER TABLE guacamole_connection_history
+    ADD CONSTRAINT guacamole_connection_history_ibfk_2
+    FOREIGN KEY (connection_id)
+    REFERENCES guacamole_connection (connection_id) ON DELETE SET NULL;
+

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-mysql/src/main/resources/org/apache/guacamole/auth/jdbc/connection/ConnectionRecordMapper.xml

@@ -37,17 +37,15 @@
     <select id="select" resultMap="ConnectionRecordResultMap">
 
         SELECT
-            guacamole_connection.connection_id,
+            guacamole_connection_history.connection_id,
-            guacamole_connection.connection_name,
+            guacamole_connection_history.connection_name,
-            guacamole_user.user_id,
+            guacamole_connection_history.user_id,
-            guacamole_user.username,
+            guacamole_connection_history.username,
             guacamole_connection_history.start_date,
             guacamole_connection_history.end_date
         FROM guacamole_connection_history
-        JOIN guacamole_connection ON guacamole_connection_history.connection_id = guacamole_connection.connection_id
-        JOIN guacamole_user ON guacamole_connection_history.user_id = guacamole_user.user_id
         WHERE
-            guacamole_connection.connection_id = #{identifier,jdbcType=VARCHAR}
+            guacamole_connection_history.connection_id = #{identifier,jdbcType=VARCHAR}
         ORDER BY
             guacamole_connection_history.start_date DESC,
             guacamole_connection_history.end_date DESC
@@ -59,13 +57,18 @@
 
         INSERT INTO guacamole_connection_history (
             connection_id,
+            connection_name,
             user_id,
+            username,
             start_date,
             end_date
         )
         VALUES (
             #{record.connectionIdentifier,jdbcType=VARCHAR},
-            #{record.userID,jdbcType=INTEGER},
+            #{record.connectionName,jdbcType=VARCHAR},
+            (SELECT user_id FROM guacamole_user
+             WHERE username = #{record.username,jdbcType=VARCHAR}),
+            #{record.username,jdbcType=VARCHAR},
             #{record.startDate,jdbcType=TIMESTAMP},
             #{record.endDate,jdbcType=TIMESTAMP}
         )
@@ -77,9 +80,9 @@
 
         SELECT
             guacamole_connection_history.connection_id,
-            guacamole_connection.connection_name,
+            guacamole_connection_history.connection_name,
             guacamole_connection_history.user_id,
-            guacamole_user.username,
+            guacamole_connection_history.username,
             guacamole_connection_history.start_date,
             guacamole_connection_history.end_date
         FROM guacamole_connection_history
@@ -132,9 +135,9 @@
 
         SELECT
             guacamole_connection_history.connection_id,
-            guacamole_connection.connection_name,
+            guacamole_connection_history.connection_name,
             guacamole_connection_history.user_id,
-            guacamole_user.username,
+            guacamole_connection_history.username,
             guacamole_connection_history.start_date,
             guacamole_connection_history.end_date
         FROM guacamole_connection_history

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-postgresql/schema/001-create-schema.sql

@@ -274,11 +274,13 @@ CREATE INDEX ON guacamole_user_permission(user_id);
 
 CREATE TABLE guacamole_connection_history (
 
-  history_id    serial      NOT NULL,
+  history_id      serial       NOT NULL,
-  user_id       integer     NOT NULL,
+  user_id         integer      DEFAULT NULL,
-  connection_id integer     NOT NULL,
+  username        varchar(128) NOT NULL,
-  start_date    timestamptz NOT NULL,
+  connection_id   integer      DEFAULT NULL,
-  end_date      timestamptz DEFAULT NULL,
+  connection_name varchar(128) NOT NULL,
+  start_date      timestamptz  NOT NULL,
+  end_date        timestamptz  DEFAULT NULL,
 
   PRIMARY KEY (history_id),
 

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-postgresql/schema/upgrade/upgrade-pre-0.9.10.sql

@@ -0,0 +1,90 @@
+--
+-- 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.
+--
+
+--
+-- User and connection IDs within history table can now be null
+--
+
+ALTER TABLE guacamole_connection_history
+    ALTER COLUMN user_id SET DEFAULT NULL,
+    ALTER COLUMN user_id DROP NOT NULL;
+
+ALTER TABLE guacamole_connection_history
+    ALTER COLUMN connection_id SET DEFAULT NULL,
+    ALTER COLUMN connection_id DROP NOT NULL;
+
+--
+-- Add new username and connection_name columns to history table
+--
+
+ALTER TABLE guacamole_connection_history
+    ADD COLUMN username varchar(128);
+
+ALTER TABLE guacamole_connection_history
+    ADD COLUMN connection_name varchar(128);
+
+--
+-- Populate new name columns by joining corresponding tables
+--
+
+UPDATE guacamole_connection_history
+    SET username = guacamole_user.username
+    FROM guacamole_user
+    WHERE guacamole_user.user_id = guacamole_connection_history.user_id;
+
+UPDATE guacamole_connection_history
+    SET connection_name = guacamole_connection.connection_name
+    FROM guacamole_connection
+    WHERE guacamole_connection.connection_id =
+        guacamole_connection_history.connection_id;
+
+--
+-- Set NOT NULL now that the column is fully populated
+--
+
+ALTER TABLE guacamole_connection_history
+    ALTER COLUMN username SET NOT NULL;
+
+ALTER TABLE guacamole_connection_history
+    ALTER COLUMN connection_name SET NOT NULL;
+
+--
+-- Remove old foreign key constraints with ON DELETE CASCADE
+--
+
+ALTER TABLE guacamole_connection_history
+    DROP CONSTRAINT guacamole_connection_history_ibfk_1;
+
+ALTER TABLE guacamole_connection_history
+    DROP CONSTRAINT guacamole_connection_history_ibfk_2;
+
+--
+-- Recreate foreign key constraints with ON DELETE SET NULL
+--
+
+ALTER TABLE guacamole_connection_history
+    ADD CONSTRAINT guacamole_connection_history_ibfk_1
+    FOREIGN KEY (user_id)
+    REFERENCES guacamole_user (user_id) ON DELETE SET NULL;
+
+ALTER TABLE guacamole_connection_history
+    ADD CONSTRAINT guacamole_connection_history_ibfk_2
+    FOREIGN KEY (connection_id)
+    REFERENCES guacamole_connection (connection_id) ON DELETE SET NULL;
+

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-postgresql/src/main/resources/org/apache/guacamole/auth/jdbc/connection/ConnectionRecordMapper.xml

@@ -37,17 +37,15 @@
     <select id="select" resultMap="ConnectionRecordResultMap">
 
         SELECT
-            guacamole_connection.connection_id,
+            guacamole_connection_history.connection_id,
-            guacamole_connection.connection_name,
+            guacamole_connection_history.connection_name,
-            guacamole_user.user_id,
+            guacamole_connection_history.user_id,
-            guacamole_user.username,
+            guacamole_connection_history.username,
             guacamole_connection_history.start_date,
             guacamole_connection_history.end_date
         FROM guacamole_connection_history
-        JOIN guacamole_connection ON guacamole_connection_history.connection_id = guacamole_connection.connection_id
-        JOIN guacamole_user ON guacamole_connection_history.user_id = guacamole_user.user_id
         WHERE
-            guacamole_connection.connection_id = #{identifier,jdbcType=INTEGER}::integer
+            guacamole_connection_history.connection_id = #{identifier,jdbcType=INTEGER}::integer
         ORDER BY
             guacamole_connection_history.start_date DESC,
             guacamole_connection_history.end_date DESC
@@ -59,13 +57,18 @@
 
         INSERT INTO guacamole_connection_history (
             connection_id,
+            connection_name,
             user_id,
+            username,
             start_date,
             end_date
         )
         VALUES (
             #{record.connectionIdentifier,jdbcType=INTEGER}::integer,
-            #{record.userID,jdbcType=INTEGER},
+            #{record.connectionName,jdbcType=VARCHAR},
+            (SELECT user_id FROM guacamole_user
+             WHERE username = #{record.username,jdbcType=VARCHAR}),
+            #{record.username,jdbcType=VARCHAR},
             #{record.startDate,jdbcType=TIMESTAMP},
             #{record.endDate,jdbcType=TIMESTAMP}
         )
@@ -77,14 +80,12 @@
 
         SELECT
             guacamole_connection_history.connection_id,
-            guacamole_connection.connection_name,
+            guacamole_connection_history.connection_name,
             guacamole_connection_history.user_id,
-            guacamole_user.username,
+            guacamole_connection_history.username,
             guacamole_connection_history.start_date,
             guacamole_connection_history.end_date
         FROM guacamole_connection_history
-        LEFT JOIN guacamole_connection ON guacamole_connection_history.connection_id = guacamole_connection.connection_id
-        LEFT JOIN guacamole_user       ON guacamole_connection_history.user_id       = guacamole_user.user_id
 
         <!-- Search terms -->
         <foreach collection="terms" item="term"
@@ -132,9 +133,9 @@
 
         SELECT
             guacamole_connection_history.connection_id,
-            guacamole_connection.connection_name,
+            guacamole_connection_history.connection_name,
             guacamole_connection_history.user_id,
-            guacamole_user.username,
+            guacamole_connection_history.username,
             guacamole_connection_history.start_date,
             guacamole_connection_history.end_date
         FROM guacamole_connection_history