[libpostgresql-jdbc-java] 22/93: Add a MainClass that tells the user they can't just run the JDBC driver

[Emmanuel Bourg]

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ebourg-guest pushed a commit to annotated tag REL9_3_1102
in repository libpostgresql-jdbc-java.

commit 9ef04115559d1292b06e0a38f76742434ac25167
Author: Craig Ringer <craig at 2ndquadrant.com>
Date:   Sat Jan 11 12:06:22 2014 +0800

    Add a MainClass that tells the user they can't just run the JDBC driver
    
    After one too many reports of
        "Failed to load Main-Class manifest attribute from postgresql-xxx.jar"
    I'm submitting a dummy main-class that tells the user what they should
    do instead.
    
    The message looks like:
    
    ------------
    PostgreSQL x.y JDBC4.1 (build bbbb)
    Found in: jar:file:/path/to/postgresql-x.y-bbbb.jdbc41.jar!/org/postgresql/Driver.class
    
    The PgJDBC driver is not an executable Java program.
    
    You must install it according to the JDBC driver installation instructions for your application / container / appserver, then use it by specifying a JDBC URL of the form
        jdbc:postgresql://
    or using an application specific method.
    
    See the PgJDBC documentation: http://jdbc.postgresql.org/documentation/head/index.html
    
    This command has had no effect.
    ------------
---
 build.xml                           |  3 +++
 org/postgresql/util/PGJDBCMain.java | 24 ++++++++++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/build.xml b/build.xml
index 949fdd8..2b86a36 100644
--- a/build.xml
+++ b/build.xml
@@ -216,6 +216,9 @@
 
       <metainf dir="META-INF">
       </metainf>
+      <manifest>
+        <attribute name="Main-Class" value="org.postgresql.util.PGJDBCMain"/>
+      </manifest>
     </jar>
   </target>
 
diff --git a/org/postgresql/util/PGJDBCMain.java b/org/postgresql/util/PGJDBCMain.java
new file mode 100644
index 0000000..8a17b16
--- /dev/null
+++ b/org/postgresql/util/PGJDBCMain.java
@@ -0,0 +1,24 @@
+package org.postgresql.util;
+
+public class PGJDBCMain {
+
+	public static void main(String[] args) {
+
+		PSQLDriverVersion.main(args);
+
+		System.out.println(
+			"\nThe PgJDBC driver is not an executable Java program.\n\n" +
+
+			"You must install it according to the JDBC driver installation " +
+			"instructions for your application / container / appserver, " +
+			"then use it by specifying a JDBC URL of the form \n" +
+			"    jdbc:postgresql://\n" +
+			"or using an application specific method.\n\n" +
+			"See the PgJDBC documentation: http://jdbc.postgresql.org/documentation/head/index.html\n\n" +
+			"This command has had no effect.\n"
+			);
+
+		System.exit(1);
+	}
+
+}

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