 | | | PHP-Lucene Integration | PHP-Lucene Integration 2005-02-07 - By amigo@(protected)
Back
Howdy,
For starters, compile and install the java bridge (and if necessary
recompile PHP and Apache2) and make sure it works (there's a test php
file supplied).
Then, here's a simplified part of my code, just to give you an example
how it works. This is the part that does the searching, indexing is done
in a similar way.
PHP:
...some code here for HTML page setup etc...
$lucene_dir = $GLOBALS["lucene_dir"];
java_set_library_path("/path/to/your/custom/lucene-classes.jar");
$obj = new Java("searcher"); // searcher is the custom written class
that does actual searching and data output
$writer = new Java("java.io.StringWriter  ");
$obj->setWriter($writer);
$obj->initSearch($lucene_dir);
$obj->getQuery($query); // $query is the user supplied query from the
HTML form, not visible here
// get the last exception
$e = java_last_exception_get();
if ($e) {
// print error
echo $e->toString();
} else {
echo $writer->toString();
$writer->flush();
$writer->close();
}
java_last_exception_get();
// clear the exception
java_last_exception_clear();
-- ---- ---- ---- ---- ---- -----
JAVA (custom written class located in the
/path/to/your/custom/lucene-classes.jar):
import ...whatever is needed here for the class...
public class searcher {
IndexReader reader = null;
IndexSearcher s = null; //the searcher used to
open/search the index
Query q = null; //the Query created by the
QueryParser
BooleanQuery query = new BooleanQuery();
Hits hits = null; //the search results
public Writer out;
public void setWriter(Writer out) {
this.out=out;
}
public void initSearch(String indexName) throws Exception {
try {
File indexFile = new File(indexName);
Directory activeDir =
FSDirectory.getDirectory(indexFile, false);
if(reader.isLocked(activeDir)) {
//out.write("Lucene index is locked, waiting 5
sec.");
Thread.sleep(5000);
}
reader = IndexReader.open(indexName);
s = new IndexSearcher(reader);
//out.write("Index opened");
} catch (Exception e) {
throw new Exception(e.getMessage());
}
}
public void getQuery(String queryString) throws Exception {
int totalhits = 0;
Analyzer analyzer = new StandardAnalyzer();
String[] queryFields =
{"field1","field2","field3","field4","field5};
float[] boostFields = {10, 6, 2, 1, 1};
try {
for ( int i = 0; i < queryFields.length; i++)
{
q = QueryParser.parse(queryString, queryFields[i],
analyzer);
if (boostFields[i] > 1)
q.setBoost(boostFields[i]);
query.add(q, false, false);
}
} catch (ParseException e) {
throw new Exception(e.getMessage());
}
try {
hits = s.search(query);
} catch (Exception e) {
throw new Exception(e.getMessage());
}
totalhits = hits.length();
if (totalhits == 0) { // if we find
no hits, tell the user
out.write("<br>I'm sorry I couldn't find your query: " +
queryString);
} else {
for (int i = 0; i < totalhits; i++) {
Document doc = hits.doc(i);
String field1 = doc.get("field1");
String field2 = doc.get("field2");
String field3 = doc.get("field3");
String field4 = doc.get("field4");
String field5 = doc.get("field5");
out.write("Field1: " + field1 + ", Field2: " + field2 + ",
Field3: " + field3 + ", Field4: " + field4 + ", Field5: " + field5 +
"<br>");
}
}
}
Sanyi said the following on 2/7/2005 3:54 AM:
>Hi!
>
>Can you please explain how did you implement the java and php part to let them
communicate through
>this bridge?
>The brige's project summary talks about "java "application-server" or a
dedicated java process"
>and I'm not into Java that much.
>Currenty I'm using a self-written command-line search program and it outputs
its results to the
>standard output.
>I guess your solution must be better ;)
>
>If the "communication parts" of your code aren't top secret, can you please
share them with me/us?
>
>Regards,
>Sanyi
>
>
>
>
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