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java.lang.Objectjavax.servlet.GenericServlet
javax.servlet.http.HttpServlet
edu.ucsb.nceas.metacat.MetaCatServlet
A metadata catalog server implemented as a Java Servlet
Valid parameters are:
action=query -- query the values of all elements and attributes and return a
result set of nodes
action=squery -- structured query (see pathquery.dtd)
action= -- export a zip format for data packadge
action=read -- read any metadata/data file from Metacat and from Internet
action=insert -- insert an XML document into the database store
action=update -- update an XML document that is in the database store
action=delete -- delete an XML document from the database store
action=validate -- vallidate the xml contained in valtext
doctype -- document type list returned by the query (publicID)
qformat=xml -- display resultset from query in XML
qformat=html -- display resultset from query in HTML
qformat=zip -- zip resultset from query
docid=34 -- display the document with the document ID number 34
doctext -- XML text of the document to load into the database
acltext -- XML access text for a document to load into the database
dtdtext -- XML DTD text for a new DTD to load into Metacat XML Catalog
query -- actual query text (to go with 'action=query' or 'action=squery')
valtext -- XML text to be validated
action=getaccesscontrol -- retrieve acl info for Metacat document
action=getdoctypes -- retrieve all doctypes (publicID)
action=getdtdschema -- retrieve a DTD or Schema file
action=getdataguide -- retrieve a Data Guide
action=getprincipals -- retrieve a list of principals in XML
datadoc -- data document name (id)
action=getlog -- get a report of events that have occurred in the system
ipAddress -- filter on one or more IP addresses
principal -- filter on one or more principals (LDAP DN syntax)
docid -- filter on one or more document identifiers (with revision)
event -- filter on event type (e.g., read, insert, update, delete)
start -- filter out events before the start date-time
end -- filter out events before the end date-time
The particular combination of parameters that are valid for each particular action value is quite specific. This documentation will be reorganized to reflect this information.
Field Summary | |
static java.lang.String |
EML2KEYWORD
|
static java.lang.String |
NONAMESPACELOCATION
|
static java.lang.String |
SCHEMALOCATIONKEYWORD
|
static java.lang.String |
XMLFORMAT
|
Constructor Summary | |
MetaCatServlet()
|
Method Summary | |
void |
destroy()
Close all db connections from the pool |
void |
doGet(javax.servlet.http.HttpServletRequest request,
javax.servlet.http.HttpServletResponse response)
Handle "GET" method requests from HTTP clients |
void |
doPost(javax.servlet.http.HttpServletRequest request,
javax.servlet.http.HttpServletResponse response)
Handle "POST" method requests from HTTP clients |
protected void |
handleQuery(java.io.PrintWriter out,
java.util.Hashtable params,
javax.servlet.http.HttpServletResponse response,
java.lang.String user,
java.lang.String[] groups,
java.lang.String sessionid)
Create the xml query, execute it and display the results. |
protected void |
handleSQuery(java.io.PrintWriter out,
java.util.Hashtable params,
javax.servlet.http.HttpServletResponse response,
java.lang.String user,
java.lang.String[] groups,
java.lang.String sessionid)
Retreive the squery xml, execute it and display it |
void |
init(javax.servlet.ServletConfig config)
Initialize the servlet by creating appropriate database connections |
Methods inherited from class javax.servlet.http.HttpServlet |
doDelete, doHead, doOptions, doPut, doTrace, getLastModified, service, service |
Methods inherited from class javax.servlet.GenericServlet |
getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, log, log |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
public static final java.lang.String SCHEMALOCATIONKEYWORD
public static final java.lang.String NONAMESPACELOCATION
public static final java.lang.String EML2KEYWORD
public static final java.lang.String XMLFORMAT
Constructor Detail |
public MetaCatServlet()
Method Detail |
public void init(javax.servlet.ServletConfig config) throws javax.servlet.ServletException
javax.servlet.ServletException
public void destroy()
public void doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) throws javax.servlet.ServletException, java.io.IOException
javax.servlet.ServletException
java.io.IOException
public void doPost(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) throws javax.servlet.ServletException, java.io.IOException
javax.servlet.ServletException
java.io.IOException
protected void handleSQuery(java.io.PrintWriter out, java.util.Hashtable params, javax.servlet.http.HttpServletResponse response, java.lang.String user, java.lang.String[] groups, java.lang.String sessionid)
out
- the output stream to the clientparams
- the Hashtable of parameters that should be included in the
squery.response
- the response object linked to the clientprotected void handleQuery(java.io.PrintWriter out, java.util.Hashtable params, javax.servlet.http.HttpServletResponse response, java.lang.String user, java.lang.String[] groups, java.lang.String sessionid)
out
- the output stream to the clientparams
- the Hashtable of parameters that should be included in the
squery.response
- the response object linked to the client
|
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