/**
* @param writer
* @param task the task
* @param taskData may be null for local tasks
* @throws CorruptIndexException
* @throws IOException
*/
private void add(IndexWriter writer, ITask task, TaskData taskData)
throws CorruptIndexException, IOException {
if (!taskIsIndexable(task, taskData)) {
return;
}
Document document = new Document();
document.add(
new Field(
FIELD_IDENTIFIER.getIndexKey(),
task.getHandleIdentifier(),
Store.YES,
org.apache.lucene.document.Field.Index.ANALYZED));
if (taskData == null) {
if ("local".equals(((AbstractTask) task).getConnectorKind())) { // $NON-NLS-1$
addIndexedAttributes(document, task);
} else {
return;
}
} else {
addIndexedAttributes(document, task, taskData.getRoot());
}
writer.addDocument(document);
}
/**
* Indicates if the given task matches the given pattern string. Uses the backing index to detect
* a match by looking for tasks that match the given pattern string. The results of the search are
* cached such that future calls to this method using the same pattern string do not require use
* of the backing index, making this method very efficient for multiple calls with the same
* pattern string. Cached results for a given pattern string are discarded if this method is
* called with a different pattern string.
*
* @param task the task to match
* @param patternString the pattern used to detect a match
*/
public boolean matches(ITask task, String patternString) {
if (patternString.equals(COMMAND_RESET_INDEX)) {
reindex();
}
Lock readLock = indexReaderLock.readLock();
readLock.lock();
try {
IndexReader indexReader = getIndexReader();
if (indexReader != null) {
Set<String> hits;
final boolean needIndexHit;
synchronized (this) {
needIndexHit =
lastResults == null
|| (lastPatternString == null || !lastPatternString.equals(patternString));
}
if (needIndexHit) {
this.lastPatternString = patternString;
hits = new HashSet<String>();
IndexSearcher indexSearcher = new IndexSearcher(indexReader);
try {
Query query = computeQuery(patternString);
TopDocs results = indexSearcher.search(query, maxMatchSearchHits);
for (ScoreDoc scoreDoc : results.scoreDocs) {
Document document = indexReader.document(scoreDoc.doc);
hits.add(document.get(FIELD_IDENTIFIER.getIndexKey()));
}
} catch (IOException e) {
StatusHandler.log(
new Status(
IStatus.ERROR,
TasksIndexCore.ID_PLUGIN,
"Unexpected failure within task list index",
e)); //$NON-NLS-1$
} finally {
try {
indexSearcher.close();
} catch (IOException e) {
// ignore
}
}
} else {
hits = lastResults;
}
synchronized (this) {
if (this.indexReader == indexReader) {
this.lastPatternString = patternString;
this.lastResults = hits;
}
}
String taskIdentifier = task.getHandleIdentifier();
return hits != null && hits.contains(taskIdentifier);
}
} finally {
readLock.unlock();
}
return false;
}
private void indexQueuedTasks(SubMonitor monitor)
throws CorruptIndexException, LockObtainFailedException, IOException, CoreException {
synchronized (reindexQueue) {
if (reindexQueue.isEmpty()) {
return;
}
monitor.beginTask(Messages.TaskListIndex_task_rebuilding_index, reindexQueue.size());
}
try {
IndexWriter writer = null;
try {
Map<ITask, TaskData> workingQueue = new HashMap<ITask, TaskData>();
// reindex tasks that are in the reindexQueue, making multiple passes so that we catch
// anything
// added/changed while we were reindexing
for (; ; ) {
workingQueue.clear();
synchronized (reindexQueue) {
if (reindexQueue.isEmpty()) {
break;
}
// move items from the reindexQueue to the temporary working queue
workingQueue.putAll(reindexQueue);
reindexQueue.keySet().removeAll(workingQueue.keySet());
}
if (writer == null) {
try {
writer = createIndexWriter(false);
} catch (CorruptIndexException e) {
rebuildIndex = true;
synchronized (reindexQueue) {
reindexQueue.clear();
}
rebuildIndexCompletely(monitor);
return;
}
}
monitor.setWorkRemaining(workingQueue.size());
for (Entry<ITask, TaskData> entry : workingQueue.entrySet()) {
ITask task = entry.getKey();
TaskData taskData = entry.getValue();
writer.deleteDocuments(
new Term(FIELD_IDENTIFIER.getIndexKey(), task.getHandleIdentifier()));
add(writer, task, taskData);
monitor.worked(1);
}
}
} finally {
if (writer != null) {
writer.close();
}
}
} finally {
monitor.done();
}
}
