org.apache.solr.handler.ContentStreamHandlerBase.java Source code

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Here is the source code for org.apache.solr.handler.ContentStreamHandlerBase.java

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/*
 * 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.apache.solr.handler;

import org.apache.solr.common.SolrException;
import org.apache.solr.common.params.SolrParams;
import org.apache.solr.common.util.ContentStream;
import org.apache.solr.common.util.NamedList;
import org.apache.solr.handler.loader.ContentStreamLoader;
import org.apache.solr.request.SolrQueryRequest;
import org.apache.solr.response.SolrQueryResponse;
import org.apache.solr.update.processor.UpdateRequestProcessor;
import org.apache.solr.update.processor.UpdateRequestProcessorChain;

/**
 * Shares common code between various handlers that manipulate 
 * {@link org.apache.solr.common.util.ContentStream} objects.
 */
public abstract class ContentStreamHandlerBase extends RequestHandlerBase {

    @Override
    public void init(NamedList args) {
        super.init(args);

        // Caching off by default
        httpCaching = false;
        if (args != null) {
            Object caching = args.get("httpCaching");
            if (caching != null) {
                httpCaching = Boolean.parseBoolean(caching.toString());
            }
        }
    }

    @Override
    public void handleRequestBody(SolrQueryRequest req, SolrQueryResponse rsp) throws Exception {
        SolrParams params = req.getParams();
        UpdateRequestProcessorChain processorChain = req.getCore().getUpdateProcessorChain(params);

        UpdateRequestProcessor processor = processorChain.createProcessor(req, rsp);

        try {
            ContentStreamLoader documentLoader = newLoader(req, processor);

            Iterable<ContentStream> streams = req.getContentStreams();
            if (streams == null) {
                if (!RequestHandlerUtils.handleCommit(req, processor, params, false)
                        && !RequestHandlerUtils.handleRollback(req, processor, params, false)) {
                    throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, "missing content stream");
                }
            } else {

                for (ContentStream stream : streams) {
                    documentLoader.load(req, rsp, stream, processor);
                }

                // Perhaps commit from the parameters
                RequestHandlerUtils.handleCommit(req, processor, params, false);
                RequestHandlerUtils.handleRollback(req, processor, params, false);
            }
        } finally {
            // finish the request
            try {
                processor.finish();
            } finally {
                processor.close();
            }
        }
    }

    protected abstract ContentStreamLoader newLoader(SolrQueryRequest req, UpdateRequestProcessor processor);
}