org.apache.oodt.grid

Class ProductQueryServlet

java.lang.Object

javax.servlet.GenericServlet

javax.servlet.http.HttpServlet

org.apache.oodt.grid.GridServlet

org.apache.oodt.grid.QueryServlet

org.apache.oodt.grid.ProductQueryServlet

All Implemented Interfaces:

Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig

Direct Known Subclasses:

RestfulProductQueryServlet

public class ProductQueryServlet
extends QueryServlet

Product query servlet handles product queries. It always returns the first matching product, if any. If no handler can provide a product, it returns 404 Not Found. If there are no query handlers, it returns 404 Not Found.

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.oodt.grid.QueryServlet

handlers

Constructor Summary

Constructors

Constructor and Description
ProductQueryServlet()

Method Summary

Methods

Modifier and Type	Method and Description
protected static boolean	displayable(String contentType) Tell if a result is displayable.
protected List	getServers(Configuration config) Get a list of Servers that will provide handlers to handle the query.
protected void	handleQuery(XMLQuery query, List handlers, javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse res) Handle the query.
protected void	suggestFilename(QueryHandler handler, Result result, javax.servlet.http.HttpServletResponse res) We can suggest a filename (if the client happens to be a browser) using a content-disposition header.

Methods inherited from class org.apache.oodt.grid.QueryServlet

doGet, doPost, getQuery

Methods inherited from class org.apache.oodt.grid.GridServlet

approveAccess, getConfigBean, getConfiguration

Methods inherited from class javax.servlet.http.HttpServlet

doDelete, doHead, doOptions, doPut, doTrace, getLastModified, service, service

Methods inherited from class javax.servlet.GenericServlet

destroy, getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, init, log, log

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ProductQueryServlet

public ProductQueryServlet()

Method Detail

getServers

protected List getServers(Configuration config)

Get a list of Servers that will provide handlers to handle the query. Subclasses implement this by returning a list of either ProductServers or ProfileServers.

Specified by:

getServers in class QueryServlet

Parameters:

config - a Configuration value.

Returns:

a List value of Servers of some kind.

handleQuery

protected void handleQuery(XMLQuery query,
               List handlers,
               javax.servlet.http.HttpServletRequest req,
               javax.servlet.http.HttpServletResponse res)
                    throws IOException,
                           javax.servlet.ServletException

Handle the query. Subclasses implement this by parsing the query and returning some results.

Specified by:

handleQuery in class QueryServlet

Parameters:

query - The query to handle.

handlers - A list of either product QueryHandlers or profile ProfileHandlers.

req - a HttpServletRequest value.

res - a HttpServletResponse value.

Throws:

IOException - if an I/O error occurs.

javax.servlet.ServletException - if a servlet error occurs.

displayable

protected static boolean displayable(String contentType)

Tell if a result is displayable. This compares its MIME type to a list of MIME types commonly displayble by browsers.

Parameters:

contentType - MIME type.

Returns:

a boolean value.

suggestFilename

protected void suggestFilename(QueryHandler handler,
                   Result result,
                   javax.servlet.http.HttpServletResponse res)

We can suggest a filename (if the client happens to be a browser) using a content-disposition header.

Parameters:

res - a HttpServletResponse value.