Examples with ResponseOp com.ibm.etcd.api.ResponseOp used on opensource projects

Example 1 with ResponseOp

use of com.ibm.etcd.api.ResponseOp in project etcd-java by IBM.

the class RangeCache method fullRefreshCache.

// internal method - should not be called while watch is active
protected ListenableFuture<Boolean> fullRefreshCache() {
    ListenableFuture<List<RangeResponse>> rrfut;
    long seenUpTo = seenUpToRev.get();
    boolean firstTime = (seenUpTo == 0L);
    if (firstTime || entries.size() <= 20) {
        // TODO *maybe* chunking (for large caches)
        ListenableFuture<RangeResponse> rrf = kvClient.get(fromKey).rangeEnd(toKey).backoffRetry(() -> !closed).timeout(300_000L).async();
        rrfut = Futures.transform(rrf, Collections::singletonList, directExecutor());
    } else {
        // in case the local cache is large, reduce data transfer by requesting
        // just keys, and full key+value only for those modified since seenUpToRev
        RangeRequest.Builder rangeReqBld = RangeRequest.newBuilder().setKey(fromKey).setRangeEnd(toKey);
        RangeRequest newModsReq = rangeReqBld.setMinModRevision(seenUpTo + 1).build();
        RangeRequest otherKeysReq = rangeReqBld.clearMinModRevision().setMaxModRevision(seenUpTo).setKeysOnly(true).build();
        ListenableFuture<TxnResponse> trf = kvClient.batch().get(newModsReq).get(otherKeysReq).backoffRetry(() -> !closed).timeout(300_000L).async();
        rrfut = Futures.transform(trf, tr -> tr.getResponsesList().stream().map(ResponseOp::getResponseRange).collect(Collectors.toList()), directExecutor());
    }
    final SettableFuture<Boolean> promise = new SettableFuture<Boolean>() {

        @Override
        protected void interruptTask() {
            if (rrfut.cancel(true)) {
                return;
            }
            Watch theWatch;
            synchronized (RangeCache.this) {
                theWatch = watch;
            }
            if (theWatch != null) {
                theWatch.close();
            }
        }
    };
    Futures.addCallback(rrfut, (FutureListener<List<RangeResponse>>) (rrs, err) -> {
        if (rrs != null)
            try {
                setupWatch(rrs, firstTime, promise);
                return;
            } catch (Throwable t) {
                err = t;
            }
        promise.setException(err);
    }, listenerExecutor);
    return promise;
}