/**
* Update the list of members of this group. Members that disappear are lost, but members that
* remain across the operation retain their state.
*
* @param urls
*/
public synchronized void setMembers(String[] urls) {
HashMap<String, RangeMember> newMembers = new HashMap<String, RangeMember>();
for (int i = 0; i < urls.length; i++) {
if (members.containsKey(urls[i])) {
newMembers.put(urls[i], members.get(urls[i]));
} else {
RangeMember newMember = new RangeMember();
newMember.setUrlBase(urls[i]);
newMembers.put(urls[i], newMember);
}
}
members = newMembers;
}
protected synchronized RangeMember findBestMember() {
RangeMember best = null;
int lowestWeight = RangeMember.UNUSABLE_WEIGHT;
Iterator<RangeMember> itr = members.values().iterator();
while (itr.hasNext()) {
RangeMember cur = itr.next();
int curWeight = cur.getWeight();
if (curWeight != RangeMember.UNUSABLE_WEIGHT) {
if ((lowestWeight == RangeMember.UNUSABLE_WEIGHT) || (curWeight < lowestWeight)) {
best = cur;
lowestWeight = curWeight;
}
}
}
return best;
}
/* (non-Javadoc)
* @see org.archive.wayback.ResourceIndex#query(org.archive.wayback.core.WaybackRequest)
*/
public SearchResults query(WaybackRequest wbRequest)
throws ResourceIndexNotAvailableException, ResourceNotInArchiveException, BadQueryException,
AccessControlException {
while (true) {
RangeMember best = findBestMember();
if (best == null) {
throw new ResourceIndexNotAvailableException("Unable to find active range for request.");
}
best.noteConnectionStart();
SearchResults results;
try {
results = best.query(wbRequest);
best.noteConnectionSuccess();
return results;
} catch (ResourceIndexNotAvailableException e) {
best.noteConnectionFailure();
} catch (ResourceNotInArchiveException e1) {
// need to catch and rethrow so we do accounting on
// activeConnections. ResourceNotInArchive is still a
// "connection success".
best.noteConnectionSuccess();
throw e1;
}
}
}
public void shutdown() throws IOException {
for (RangeMember member : members.values()) {
member.shutdown();
}
}
