/**
*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.solbase;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.List;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.solr.common.params.CommonParams;
import org.apache.solr.common.util.NamedList;
import org.apache.solr.common.util.SimpleOrderedMap;
import org.apache.solr.core.CoreContainer.Initializer;
import org.apache.solr.core.SolbaseCoreContainer;
import org.apache.solr.core.SolrCore;
import org.apache.solr.request.BinaryQueryResponseWriter;
import org.apache.solr.request.QueryResponseWriter;
import org.apache.solr.request.SolrQueryRequest;
import org.apache.solr.request.SolrQueryResponse;
import org.apache.solr.request.SolrRequestHandler;
import org.apache.solr.servlet.SolrDispatchFilter;
import org.apache.solr.servlet.cache.Method;
public class SolbaseDispatchFilter extends SolrDispatchFilter
{
private static final String schemaPrefix = "/schema";
private static final String pingPrefix = "/ping";
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException,
ServletException
{
HttpServletRequest req = (HttpServletRequest) request;
HttpServletResponse resp = (HttpServletResponse) response;
String indexName = "";
String path = req.getServletPath();
if (req.getPathInfo() != null)
{
// this lets you handle /update/commit when /update is a servlet
path += req.getPathInfo();
}
// pinging to get sharding information
if(path.startsWith(pingPrefix)){
indexName = parseIndexname(path, pingPrefix);
try
{
int numShard = SolbaseShardUtil.getNumShard();
List<String> hosts = SolbaseShardUtil.getShardHosts();
int numPerShard = SolbaseShardUtil.getNumPerShard();
response.setContentType("text/xml");
PrintWriter out = resp.getWriter();
out.print("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n");
out.print("<result>");
out.print("<numshard>" + numShard + "</numshard>");
out.print("<numpershard>" + numPerShard + "</numpershard>");
for(String host: hosts){
out.print("<host>"+host+"</host>");
}
out.print("</result>");
}
catch (IOException e)
{
resp.sendError(404);
}
return;
}
// schema reading/putting
if (path.startsWith(schemaPrefix))
{
indexName = parseIndexname(path, schemaPrefix);
// REST
String method = req.getMethod().toUpperCase();
if (method.equals("GET"))
{
try
{
String schema = SolbaseCoreContainer.readSchemaXML(indexName);
response.setContentType("text/xml");
PrintWriter out = resp.getWriter();
out.print(schema);
}
catch (IOException e)
{
resp.sendError(404);
}
return;
}
if (method.equals("POST") || method.equals("PUT"))
{
try
{
BufferedReader rd = new BufferedReader(new InputStreamReader(req.getInputStream()));
String line;
String xml = "";
while ((line = rd.readLine()) != null)
{
xml += line + "\n";
}
SolbaseCoreContainer.writeSchema(indexName, xml);
}
catch (IOException e)
{
resp.sendError(500);
}
return;
}
}
super.doFilter(request, response, chain);
}
protected String parseIndexname(String path, String prefix){
path = path.substring(prefix.length());
// otherwise, we should find a index from the path
int idx = path.indexOf("/", 1);
if (idx > 1)
{
// try to get the index as a request parameter first
return path.substring(1, idx);
}
else
{
return path.substring(1);
}
}
@Override
protected Initializer createInitializer()
{
SolbaseInitializer init = new SolbaseInitializer();
return init;
}
@Override
protected void execute(HttpServletRequest req, SolrRequestHandler handler, SolrQueryRequest sreq,
SolrQueryResponse rsp)
{
String path = req.getServletPath();
if (req.getPathInfo() != null)
{
// this lets you handle /update/commit when /update is a servlet
path += req.getPathInfo();
}
if (pathPrefix != null && path.startsWith(pathPrefix))
{
path = path.substring(pathPrefix.length());
}
int idx = path.indexOf("/", 1);
if (idx > 1)
{
// try to get the corename as a request parameter first
sreq.getContext().put("solbase-index", path.substring(1, idx));
}
super.execute(req, handler, sreq, rsp);
}
@SuppressWarnings({ "unused", "unchecked" })
private void handleAdminRequest(HttpServletRequest req, ServletResponse response, SolrRequestHandler handler,
SolrQueryRequest solrReq) throws IOException
{
SolrQueryResponse solrResp = new SolrQueryResponse();
final NamedList<Object> responseHeader = new SimpleOrderedMap<Object>();
solrResp.add("responseHeader", responseHeader);
NamedList<Object> toLog = solrResp.getToLog();
toLog.add("webapp", req.getContextPath());
toLog.add("path", solrReq.getContext().get("path"));
toLog.add("params", "{" + solrReq.getParamString() + "}");
handler.handleRequest(solrReq, solrResp);
SolrCore.setResponseHeaderValues(handler, solrReq, solrResp);
StringBuilder sb = new StringBuilder();
for (int i = 0; i < toLog.size(); i++)
{
String name = toLog.getName(i);
Object val = toLog.getVal(i);
sb.append(name).append("=").append(val).append(" ");
}
QueryResponseWriter respWriter = SolrCore.DEFAULT_RESPONSE_WRITERS
.get(solrReq.getParams().get(CommonParams.WT));
if (respWriter == null)
respWriter = SolrCore.DEFAULT_RESPONSE_WRITERS.get("standard");
writeResponse(solrResp, response, respWriter, solrReq, Method.getMethod(req.getMethod()));
}
private void writeResponse(SolrQueryResponse solrRsp, ServletResponse response, QueryResponseWriter responseWriter,
SolrQueryRequest solrReq, Method reqMethod) throws IOException
{
if (solrRsp.getException() != null)
{
sendError((HttpServletResponse) response, solrRsp.getException());
}
else
{
// Now write it out
response.setContentType(responseWriter.getContentType(solrReq, solrRsp));
if (Method.HEAD != reqMethod)
{
if (responseWriter instanceof BinaryQueryResponseWriter)
{
BinaryQueryResponseWriter binWriter = (BinaryQueryResponseWriter) responseWriter;
binWriter.write(response.getOutputStream(), solrReq, solrRsp);
}
else
{
PrintWriter out = response.getWriter();
responseWriter.write(out, solrReq, solrRsp);
}
}
// else http HEAD request, nothing to write out, waited this long
// just to get ContentType
}
}
}