针对.xsd文件验证.xml的XML错误

Question

each time I run my app engine application in the devserver locally the appengine-application.xml file seems to be automatically re-generating. Each time it reverts back to a version with a simple syntax error.

Question: where is the file regenerated/copied from? How do I edit it and cause the changes to persist?

There is an opening < missing at the beginning of this file. I have done the following to attempt to edit and save the file:used terminal commands vi- vim- and nano as an admin and a root user, as well as xcode and a plain text editor.

here is the file with the error, appengine-application.xml ( missing and oppening '<' before '?xml version="1.0 encoding=...').

file path:../guestbook/guestbook-ear/target/guestbook-ear-1.0-SNAPSHOT/META-INF/appengine-application.xml

?xml version="1.0" encoding="utf-8" standalone="no"?>
<appengine-application xmlns="http://appengine.google.com/ns/1.0">
<application>single-loop-665 </application>
</appengine-application>

here is the appengine-application.xsd

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified"     targetNamespace="http://appengine.google.com/ns/1.0" xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="appengine-application" type="ns:appengine-applicationType" xmlns:ns="http://appengine.google.com/ns/1.0"/>
 <xs:complexType name="appengine-applicationType">
    <xs:all>
        <xs:element type="xs:string" name="application"/>
    </xs:all>
</xs:complexType>
</xs:schema>

this is the error:

[INFO] Caused by: com.google.apphosting.utils.config.AppEngineConfigException: XML error validating /Users/jamesjohnson/guestbook/guestbook-ear/target/guestbook-ear-1.0-SNAPSHOT/META-INF/appengine-application.xml against /Users/jamesjohnson/.m2/repository/com/google/appengine/appengine-java-sdk/1.9.8/appengine-java-sdk/appengine-java-sdk-1.9.8/docs/appengine-application.xsd

Answer 1

Solved!

so it appears as though there is a copy made of the app each time it is run. This means that all the xml files and everything else contained in the guestbook-war/src directory is copied into a file called appname-version-SNAPSHOT. It appears that the SNAPSHOT file is where the source code for the app is compiled and run from.

In order for edits to persist you must edit the files contained in your

appname-war/src/main 

directory.

The confusing part is that the error thrown will point you to the copy of the code located in the

appname-ear/target/appname-ear-1.0-SNAPSHOT/appname-war-1.0-SNAPSHOT.war

if you edit the code in these files it will have no significance at run time. These files are generated each time the app is run.