de.fuberlin.wiwiss.marbles
Class MarblesServlet

java.lang.Object
  javax.servlet.GenericServlet
      javax.servlet.http.HttpServlet
          de.fuberlin.wiwiss.marbles.MarblesServlet

All Implemented Interfaces:

java.io.Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig

public class MarblesServlet
extends javax.servlet.http.HttpServlet
implements javax.servlet.Servlet

Implements REST services to view, discover, load and clear URIs/URLs, as well as a SPARQL endpoint

Author:

Christian Becker

See Also:

Serialized Form

Constructor Summary

MarblesServlet()

Method Summary

void	destroy() Shuts down repositories
void	discoverResource(java.lang.String uri, java.io.OutputStream outputStream) Tries to dereference the URI and queries data providers for data; then follows known predicates (discover)
protected void	doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)
protected void	doPost(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)
void	fresnelView(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) Discovers an URI and renders a given view for it (view).
protected void	handleRequest(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) Handles HTTP GET and POST requests
void	init(javax.servlet.ServletConfig config) Reads servlet configuration, initializes Sesame repositories and loads ontologies
static void	loadTriples(org.openrdf.repository.Repository store, java.io.File file, java.util.HashMap<java.lang.String,java.lang.String> parameters, org.openrdf.model.Resource... context) Reads data from a URL in a given syntax into a Sesame repository; supports ParamReader

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

Methods inherited from interface javax.servlet.Servlet

getServletConfig, getServletInfo, service

Constructor Detail

MarblesServlet

public MarblesServlet()

Method Detail

init

public void init(javax.servlet.ServletConfig config)
          throws javax.servlet.ServletException

Reads servlet configuration, initializes Sesame repositories and loads ontologies

Specified by:

init in interface javax.servlet.Servlet

Overrides:

init in class javax.servlet.GenericServlet

Throws:

javax.servlet.ServletException

destroy

public void destroy()

Shuts down repositories

Specified by:

destroy in interface javax.servlet.Servlet

Overrides:

destroy in class javax.servlet.GenericServlet

handleRequest

protected void handleRequest(javax.servlet.http.HttpServletRequest request,
                             javax.servlet.http.HttpServletResponse response)
                      throws java.io.IOException

Handles HTTP GET and POST requests

Parameters:

request -

response -

Throws:

java.io.IOException

discoverResource

public void discoverResource(java.lang.String uri,
                             java.io.OutputStream outputStream)

Tries to dereference the URI and queries data providers for data; then follows known predicates (discover)

Parameters:

uri - The resource of interest

outputStream - Output stream to communicate the result to

fresnelView

public void fresnelView(javax.servlet.http.HttpServletRequest request,
                        javax.servlet.http.HttpServletResponse response)
                 throws java.io.IOException

Discovers an URI and renders a given view for it (view).

Parameters:

request -

response -

Throws:

java.io.IOException

doGet

protected void doGet(javax.servlet.http.HttpServletRequest request,
                     javax.servlet.http.HttpServletResponse response)
              throws java.io.IOException

Overrides:

doGet in class javax.servlet.http.HttpServlet

Throws:

java.io.IOException

doPost

protected void doPost(javax.servlet.http.HttpServletRequest request,
                      javax.servlet.http.HttpServletResponse response)
               throws javax.servlet.ServletException,
                      java.io.IOException

Overrides:

doPost in class javax.servlet.http.HttpServlet

Throws:

javax.servlet.ServletException

java.io.IOException

loadTriples

public static void loadTriples(org.openrdf.repository.Repository store,
                               java.io.File file,
                               java.util.HashMap<java.lang.String,java.lang.String> parameters,
                               org.openrdf.model.Resource... context)
                        throws java.lang.Exception

Reads data from a URL in a given syntax into a Sesame repository; supports ParamReader

Parameters:

store - Add RDF to this LocalRepository

url - The String location of the data

syntax - The String syntax of the data

Throws:

java.lang.Exception - For any problems encountered during read of data from the URL