Example usage for java.util.concurrent.atomic AtomicReference set

List of usage examples for java.util.concurrent.atomic AtomicReference set

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Introduction

In this page you can find the example usage for java.util.concurrent.atomic AtomicReference set.

Prototype

public final void set(V newValue)

Source Link

Document

Sets the value to newValue , with memory effects as specified by VarHandle#setVolatile .

Usage

From source file:org.apache.nifi.provenance.MiNiFiPersistentProvenanceRepository.java

/**
 * <p>/*from  ww  w .ja  v  a2s.  co  m*/
 * MUST be called with the write lock held.
 * </p>
 * <p>
 * Rolls over the data in the journal files, merging them into a single Provenance Event Log File, and
 * compressing as needed.
 *
 * @param force if true, will force a rollover regardless of whether or not data has been written
 * @throws IOException if unable to complete rollover
 */
private void rollover(final boolean force) throws IOException {
    if (!configuration.isAllowRollover()) {
        return;
    }

    // If this is the first time we're creating the out stream, or if we
    // have written something to the stream, then roll over
    if (force || recordsWrittenSinceRollover.get() > 0L || dirtyWriterCount.get() > 0) {
        final List<File> journalsToMerge = new ArrayList<>();
        for (final RecordWriter writer : writers) {
            if (!writer.isClosed()) {
                final File writerFile = writer.getFile();
                journalsToMerge.add(writerFile);
                try {
                    writer.close();
                } catch (final IOException ioe) {
                    logger.warn("Failed to close {} due to {}", writer, ioe.toString());
                    if (logger.isDebugEnabled()) {
                        logger.warn("", ioe);
                    }
                }
            }
        }

        if (logger.isDebugEnabled()) {
            if (journalsToMerge.isEmpty()) {
                logger.debug("No journals to merge; all RecordWriters were already closed");
            } else {
                logger.debug("Going to merge {} files for journals starting with ID {}", journalsToMerge.size(),
                        StringUtils.substringBefore(journalsToMerge.get(0).getName(), "."));
            }
        }

        // Choose a storage directory to store the merged file in.
        final long storageDirIdx = storageDirectoryIndex.getAndIncrement();
        final List<File> storageDirs = configuration.getStorageDirectories();
        final File storageDir = storageDirs.get((int) (storageDirIdx % storageDirs.size()));

        Future<?> future = null;
        if (!journalsToMerge.isEmpty()) {
            // Run the rollover logic in a background thread.
            final AtomicReference<Future<?>> futureReference = new AtomicReference<>();
            final int recordsWritten = recordsWrittenSinceRollover.getAndSet(0);
            final Runnable rolloverRunnable = new Runnable() {
                @Override
                public void run() {
                    try {
                        final File fileRolledOver;

                        try {
                            fileRolledOver = mergeJournals(journalsToMerge,
                                    getMergeFile(journalsToMerge, storageDir), eventReporter);
                        } catch (final IOException ioe) {
                            logger.error(
                                    "Failed to merge Journal Files {} into a Provenance Log File due to {}",
                                    journalsToMerge, ioe.toString());
                            logger.error("", ioe);
                            return;
                        }

                        if (fileRolledOver == null) {
                            logger.debug(
                                    "Couldn't merge journals. Will try again in 10 seconds. journalsToMerge: {}, storageDir: {}",
                                    journalsToMerge, storageDir);
                            return;
                        }
                        final File file = fileRolledOver;

                        // update our map of id to Path
                        // We need to make sure that another thread doesn't also update the map at the same time. We cannot
                        // use the write lock when purging old events, and we want to use the same approach here.
                        boolean updated = false;
                        final Long fileFirstEventId = Long
                                .valueOf(StringUtils.substringBefore(fileRolledOver.getName(), "."));
                        while (!updated) {
                            final SortedMap<Long, Path> existingPathMap = idToPathMap.get();
                            final SortedMap<Long, Path> newIdToPathMap = new TreeMap<>(new PathMapComparator());
                            newIdToPathMap.putAll(existingPathMap);
                            newIdToPathMap.put(fileFirstEventId, file.toPath());
                            updated = idToPathMap.compareAndSet(existingPathMap, newIdToPathMap);
                        }

                        logger.info("Successfully Rolled over Provenance Event file containing {} records",
                                recordsWritten);
                        rolloverCompletions.getAndIncrement();

                        // We have finished successfully. Cancel the future so that we don't run anymore
                        Future<?> future;
                        while ((future = futureReference.get()) == null) {
                            try {
                                Thread.sleep(10L);
                            } catch (final InterruptedException ie) {
                            }
                        }

                        future.cancel(false);
                    } catch (final Throwable t) {
                        logger.error("Failed to rollover Provenance repository due to {}", t.toString());
                        logger.error("", t);
                    }
                }
            };

            // We are going to schedule the future to run immediately and then repeat every 10 seconds. This allows us to keep retrying if we
            // fail for some reason. When we succeed, the Runnable will cancel itself.
            future = rolloverExecutor.scheduleWithFixedDelay(rolloverRunnable, 0, 10, TimeUnit.SECONDS);
            futureReference.set(future);
        }

        streamStartTime.set(System.currentTimeMillis());
        bytesWrittenSinceRollover.set(0);

        // We don't want to create new 'writers' until the number of unmerged journals falls below our threshold. So we wait
        // here before we repopulate the 'writers' member variable and release the lock.
        int journalFileCount = getJournalCount();
        long repoSize = getSize(getLogFiles(), 0L);
        final int journalCountThreshold = configuration.getJournalCount() * 5;
        final long sizeThreshold = (long) (configuration.getMaxStorageCapacity() * 1.1D); // do not go over 10% of max capacity

        // check if we need to apply backpressure.
        // If we have too many journal files, or if the repo becomes too large, backpressure is necessary. Without it,
        // if the rate at which provenance events are registered exceeds the rate at which we can compress/merge them,
        // then eventually we will end up with all of the data stored in the 'journals' directory. This
        // would mean that the data would never even be accessible. In order to prevent this, if we exceeds 110% of the configured
        // max capacity for the repo, or if we have 5 sets of journal files waiting to be merged, we will block here until
        // that is no longer the case.
        if (journalFileCount > journalCountThreshold || repoSize > sizeThreshold) {
            logger.warn("The rate of the dataflow is exceeding the provenance recording rate. "
                    + "Slowing down flow to accommodate. Currently, there are {} journal files ({} bytes) and "
                    + "threshold for blocking is {} ({} bytes)", journalFileCount, repoSize,
                    journalCountThreshold, sizeThreshold);
            eventReporter.reportEvent(Severity.WARNING, "Provenance Repository", "The rate of the dataflow is "
                    + "exceeding the provenance recording rate. Slowing down flow to accommodate");

            while (journalFileCount > journalCountThreshold || repoSize > sizeThreshold) {
                // if a shutdown happens while we are in this loop, kill the rollover thread and break
                if (this.closed.get()) {
                    if (future != null) {
                        future.cancel(true);
                    }

                    break;
                }

                if (repoSize > sizeThreshold) {
                    logger.debug(
                            "Provenance Repository has exceeded its size threshold; will trigger purging of oldest events");
                    purgeOldEvents();

                    journalFileCount = getJournalCount();
                    repoSize = getSize(getLogFiles(), 0L);
                    continue;
                } else {
                    // if we are constrained by the number of journal files rather than the size of the repo,
                    // then we will just sleep a bit because another thread is already actively merging the journals,
                    // due to the runnable that we scheduled above
                    try {
                        Thread.sleep(100L);
                    } catch (final InterruptedException ie) {
                    }
                }

                logger.debug(
                        "Provenance Repository is still behind. Keeping flow slowed down "
                                + "to accommodate. Currently, there are {} journal files ({} bytes) and "
                                + "threshold for blocking is {} ({} bytes)",
                        journalFileCount, repoSize, journalCountThreshold, sizeThreshold);

                journalFileCount = getJournalCount();
                repoSize = getSize(getLogFiles(), 0L);
            }

            logger.info(
                    "Provenance Repository has now caught up with rolling over journal files. Current number of "
                            + "journal files to be rolled over is {}",
                    journalFileCount);
        }

        // we've finished rolling over successfully. Create new writers and reset state.
        writers = createWriters(configuration, idGenerator.get());
        dirtyWriterCount.set(0);
        streamStartTime.set(System.currentTimeMillis());
        recordsWrittenSinceRollover.getAndSet(0);
    }
}

From source file:cl.gisred.android.RegEquipoActivity.java

private void cerrarDialogCrear(boolean bSave, @Nullable View viewDialog) {
    final AtomicReference<String> resp = new AtomicReference<>("");

    if (bSave) {// w w  w .j  a  v  a 2 s  .  c  om
        if (!validarVista(viewDialog)) {
            DialogoConfirmacion oDialog = new DialogoConfirmacion();
            oDialog.show(getFragmentManager(), "tagAlert");
            return;
        } else {
            switch (idResLayoutSelect) {
            case R.layout.dialog_poste:
                oLyAddGraphs = LyAddPoste;
                break;
            case R.layout.dialog_direccion:
                oLyAddGraphs = LyAddDireccion;
                break;
            case R.layout.dialog_cliente:
                oLyAddGraphs = LyAddCliente;
                break;
            case R.layout.dialog_cliente_cnr:
                oLyAddGraphs = LyAddClienteCnr;
                break;
            }

            if (oLyAddGraphs != null) {
                View oView = getLayoutValidate(viewDialog);
                Util oUtil = new Util(oUbicacion);

                ArrayList<Map<String, Object>> oAttrToSave = oUtil.getAttrAddByView(oView, idResLayoutSelect,
                        empresa);

                Map<String, Object> attributes = oAttrToSave.get(0);
                Graphic newFeatureGraphic = new Graphic(oUbicacion, null, attributes);
                Graphic[] adds = { newFeatureGraphic };

                if (idResLayoutSelect == R.layout.dialog_cliente_cnr
                        || idResLayoutSelect == R.layout.dialog_cliente) {
                    addsUnion = Util.addAttrUnionPoint(oAttrToSave, oUbicacion);
                }

                oLyAddGraphs.applyEdits(adds, null, null, new CallbackListener<FeatureEditResult[][]>() {

                    @Override
                    public void onCallback(FeatureEditResult[][] featureEditResults) {
                        if (featureEditResults[0] != null) {
                            if (featureEditResults[0][0] != null && featureEditResults[0][0].isSuccess()) {

                                resp.set(
                                        "Guardado Correctamente Id: " + featureEditResults[0][0].getObjectId());

                                if (idResLayoutSelect == R.layout.dialog_cliente_cnr
                                        || idResLayoutSelect == R.layout.dialog_cliente)
                                    LyAddUnion.applyEdits(addsUnion, null, null, callBackUnion());

                                runOnUiThread(new Runnable() {

                                    @Override
                                    public void run() {
                                        Util.showConfirmation(RegEquipoActivity.this, resp.get());
                                    }
                                });
                            }
                        }
                    }

                    @Override
                    public void onError(Throwable throwable) {
                        resp.set("Error al grabar: " + throwable.getLocalizedMessage());
                        Log.w("onError", resp.get());

                        runOnUiThread(new Runnable() {

                            @Override
                            public void run() {
                                Toast.makeText(RegEquipoActivity.this, resp.get(), Toast.LENGTH_SHORT).show();
                            }
                        });
                    }

                });
            }
        }
    } else {
        resp.set("Cancelado");
        Toast.makeText(RegEquipoActivity.this, resp.get(), Toast.LENGTH_LONG).show();
    }

    bMapTap = false;

    if (mBusquedaLayer != null && myMapView.getLayerByID(mBusquedaLayer.getID()) != null)
        myMapView.removeLayer(mBusquedaLayer);

    if (mUbicacionLayer != null && myMapView.getLayerByID(mUbicacionLayer.getID()) != null)
        myMapView.removeLayer(mUbicacionLayer);

    if (mSeleccionLayer != null && myMapView.getLayerByID(mSeleccionLayer.getID()) != null)
        myMapView.removeLayer(mSeleccionLayer);

    oUbicacion = null;
    if (bVerCapas)
        toogleCapas(fabVerCapas);
    //setLayerAddToggle(false);
    if (bIngCliente)
        menuMultipleActions.setVisibility(View.VISIBLE);
    menuMicroActions.setVisibility(View.VISIBLE);
    fabShowDialog.setVisibility(View.GONE);
    dialogCrear.dismiss();
    if (oLyAddGraphs != null)
        oLyAddGraphs.setVisible(true);
}

From source file:cl.gisred.android.MicroMedidaActivity.java

private void cerrarDialogCrear(boolean bSave, @Nullable View viewDialog) {
    final AtomicReference<String> resp = new AtomicReference<>("");

    if (bSave) {//from   www.j  a  va2  s.  c o m
        if (!validarVista(viewDialog)) {
            DialogoConfirmacion oDialog = new DialogoConfirmacion();
            oDialog.show(getFragmentManager(), "tagAlert");
            return;
        } else {
            switch (idResLayoutSelect) {
            case R.layout.dialog_poste:
                oLyAddGraphs = LyAddPoste;
                break;
            case R.layout.dialog_direccion:
                oLyAddGraphs = LyAddDireccion;
                break;
            case R.layout.dialog_cliente:
                oLyAddGraphs = LyAddCliente;
                break;
            case R.layout.dialog_cliente_cnr:
                oLyAddGraphs = LyAddClienteCnr;
                break;
            }

            if (oLyAddGraphs != null) {
                View oView = getLayoutValidate(viewDialog);
                Util oUtil = new Util(oUbicacion);

                ArrayList<Map<String, Object>> oAttrToSave = oUtil.getAttrAddByView(oView, idResLayoutSelect,
                        empresa);

                Map<String, Object> attributes = oAttrToSave.get(0);
                Graphic newFeatureGraphic = new Graphic(oUbicacion, null, attributes);
                Graphic[] adds = { newFeatureGraphic };

                if (idResLayoutSelect == R.layout.dialog_cliente_cnr
                        || idResLayoutSelect == R.layout.dialog_cliente) {
                    addsUnion = Util.addAttrUnionPoint(oAttrToSave, oUbicacion);
                }

                oLyAddGraphs.applyEdits(adds, null, null, new CallbackListener<FeatureEditResult[][]>() {

                    @Override
                    public void onCallback(FeatureEditResult[][] featureEditResults) {
                        if (featureEditResults[0] != null) {
                            if (featureEditResults[0][0] != null && featureEditResults[0][0].isSuccess()) {

                                resp.set(
                                        "Guardado Correctamente Id: " + featureEditResults[0][0].getObjectId());

                                if (idResLayoutSelect == R.layout.dialog_cliente_cnr
                                        || idResLayoutSelect == R.layout.dialog_cliente)
                                    LyAddUnion.applyEdits(addsUnion, null, null, callBackUnion());

                                runOnUiThread(new Runnable() {

                                    @Override
                                    public void run() {
                                        Util.showConfirmation(MicroMedidaActivity.this, resp.get());
                                    }
                                });
                            }
                        }
                    }

                    @Override
                    public void onError(Throwable throwable) {
                        resp.set("Error al grabar: " + throwable.getLocalizedMessage());
                        Log.w("onError", resp.get());

                        runOnUiThread(new Runnable() {

                            @Override
                            public void run() {
                                Toast.makeText(MicroMedidaActivity.this, resp.get(), Toast.LENGTH_SHORT).show();
                            }
                        });
                    }

                });
            }
        }
    } else {
        resp.set("Cancelado");
        Toast.makeText(MicroMedidaActivity.this, resp.get(), Toast.LENGTH_LONG).show();
    }

    bMapTap = false;

    if (mBusquedaLayer != null && myMapView.getLayerByID(mBusquedaLayer.getID()) != null)
        myMapView.removeLayer(mBusquedaLayer);

    if (mUbicacionLayer != null && myMapView.getLayerByID(mUbicacionLayer.getID()) != null)
        myMapView.removeLayer(mUbicacionLayer);

    if (mSeleccionLayer != null && myMapView.getLayerByID(mSeleccionLayer.getID()) != null)
        myMapView.removeLayer(mSeleccionLayer);

    oUbicacion = null;
    if (bVerCapas)
        toogleCapas(fabVerCapas);
    //setLayerAddToggle(false);
    if (bIngCliente)
        menuMultipleActions.setVisibility(View.VISIBLE);
    menuMicroActions.setVisibility(View.VISIBLE);
    fabShowDialog.setVisibility(View.GONE);
    dialogCrear.dismiss();
    if (oLyAddGraphs != null)
        oLyAddGraphs.setVisible(true);
}

From source file:com.microsoft.tfs.core.clients.versioncontrol.VersionControlClient.java

/**
 * @see #determineWorkspaceNameAndOwner(ItemSpec[], AtomicReference<String>,
 *      AtomicReference<String>)/*from   w  w w  .  j ava2 s .  c o  m*/
 */
public void determineWorkspaceNameAndOwner(final String[] paths, final AtomicReference<String> workspaceName,
        final AtomicReference<String> workspaceOwner) {
    if (paths == null) {
        workspaceName.set(null);
        workspaceOwner.set(null);
    } else {
        determineWorkspaceNameAndOwner(ItemSpec.fromStrings(paths, RecursionType.NONE), workspaceName,
                workspaceOwner);
    }
}

From source file:com.microsoft.tfs.core.clients.versioncontrol.VersionControlClient.java

/**
 * @see #determineWorkspaceNameAndOwner(ItemSpec[], AtomicReference<String>,
 *      AtomicReference<String>)//from w ww  .jav a 2  s  . co m
 */
public void determineWorkspaceNameAndOwner(final LabelItemSpec[] labelItemSpecs,
        final AtomicReference<String> workspaceName, final AtomicReference<String> workspaceOwner) {
    if (labelItemSpecs == null) {
        workspaceName.set(null);
        workspaceOwner.set(null);
    } else {
        final ItemSpec[] itemSpecs = new ItemSpec[labelItemSpecs.length];
        for (int i = 0; i < itemSpecs.length; i++) {
            itemSpecs[i] = labelItemSpecs[i].getItemSpec();
        }

        determineWorkspaceNameAndOwner(itemSpecs, workspaceName, workspaceOwner);
    }
}

From source file:com.microsoft.tfs.core.clients.versioncontrol.VersionControlClient.java

/**
 * @see #determineWorkspaceNameAndOwner(ItemSpec[], AtomicReference<String>,
 *      AtomicReference<String>)/*from  w  ww .ja v  a2s  .com*/
 */
public void determineWorkspaceNameAndOwner(final ItemSpec itemSpec, final AtomicReference<String> workspaceName,
        final AtomicReference<String> workspaceOwner) {
    if (itemSpec == null) {
        workspaceName.set(null);
        workspaceOwner.set(null);
    } else {
        determineWorkspaceNameAndOwner(new ItemSpec[] { itemSpec }, workspaceName, workspaceOwner);
    }
}

From source file:com.microsoft.tfs.core.clients.versioncontrol.VersionControlClient.java

/**
 * @see #determineWorkspaceNameAndOwner(ItemSpec[], AtomicReference<String>,
 *      AtomicReference<String>)//from ww  w . j a  v a 2  s  . c o  m
 */
public void determineWorkspaceNameAndOwner(final SecurityChange[] securityChanges,
        final AtomicReference<String> workspaceName, final AtomicReference<String> workspaceOwner) {
    if (securityChanges == null) {
        workspaceName.set(null);
        workspaceOwner.set(null);
    } else {
        final ItemSpec[] itemSpecs = new ItemSpec[securityChanges.length];
        for (int i = 0; i < itemSpecs.length; i++) {
            itemSpecs[i] = new ItemSpec(securityChanges[i].getItem(), RecursionType.NONE);
        }

        determineWorkspaceNameAndOwner(itemSpecs, workspaceName, workspaceOwner);
    }
}

From source file:com.microsoft.tfs.core.clients.versioncontrol.VersionControlClient.java

/**
 * Determine the workspace name and owner for all given items which are
 * local paths. Throws if any two paths are in different workspaces. Does
 * not throw if no workspace was found ({@link AtomicReference<String>}
 * values are set to <code>null</code>).
 *
 * @param itemSpecs/*from  w ww.  java 2s .  c om*/
 *        the {@link ItemSpec}s to determine name and owner for (if
 *        <code>null</code>, both {@link AtomicReference<String>} values are
 *        set to <code>null</code>)
 * @param workspaceName
 *        the {@link AtomicReference<String>} to update with the workspace
 *        name (must not be <code>null</code>)
 * @param workspaceOwner
 *        the {@link AtomicReference<String>} to update with the workspace
 *        owner (must not be <code>null</code>)
 * @throws OnlyOneWorkspaceException
 *         if any two paths are in different workspaces
 */
public void determineWorkspaceNameAndOwner(final ItemSpec[] itemSpecs,
        final AtomicReference<String> workspaceName, final AtomicReference<String> workspaceOwner) {
    if (itemSpecs == null) {
        workspaceName.set(null);
        workspaceOwner.set(null);
    } else {
        Workspace workspace = null;

        for (int i = 0; i < itemSpecs.length; i++) {
            final ItemSpec spec = itemSpecs[i];

            if (ServerPath.isServerPath(spec.getItem()) == false) {
                final Workspace itemWorkspace = getWorkspace(spec.getItem());

                if (workspace == null) {
                    workspace = itemWorkspace;
                } else if (workspace.equals(itemWorkspace) == false) {
                    throw new OnlyOneWorkspaceException(itemWorkspace, spec.getItem());
                }
            }
        }

        if (workspace == null) {
            workspaceName.set(null);
            workspaceOwner.set(null);
        } else {
            workspaceName.set(workspace.getName());
            workspaceOwner.set(workspace.getOwnerName());
        }
    }
}

From source file:com.microsoft.tfs.core.clients.versioncontrol.VersionControlClient.java

/**
 * @see #determineWorkspaceNameAndOwner(ItemSpec[], AtomicReference<String>,
 *      AtomicReference<String>)/*from www .j a  va2  s  .  c  om*/
 */
public void determineWorkspaceNameAndOwner(final String path, final AtomicReference<String> workspaceName,
        final AtomicReference<String> workspaceOwner) {
    if (path == null || path.length() == 0) {
        workspaceName.set(null);
        workspaceOwner.set(null);
    } else {
        determineWorkspaceNameAndOwner(new ItemSpec(path, RecursionType.NONE), workspaceName, workspaceOwner);
    }
}

From source file:de.schildbach.pte.AbstractEfaProvider.java

protected NearbyLocationsResult mobileCoordRequest(final EnumSet<LocationType> types, final int lat,
        final int lon, final int maxDistance, final int maxStations) throws IOException {
    final HttpUrl.Builder url = coordEndpoint.newBuilder();
    appendXmlCoordRequestParameters(url, types, lat, lon, maxDistance, maxStations);
    final AtomicReference<NearbyLocationsResult> result = new AtomicReference<>();

    final HttpClient.Callback callback = new HttpClient.Callback() {
        @Override/*from w w w  . j a v a  2  s .  com*/
        public void onSuccessful(final CharSequence bodyPeek, final ResponseBody body) throws IOException {
            try {
                final XmlPullParser pp = parserFactory.newPullParser();
                pp.setInput(body.byteStream(), null); // Read encoding from XML declaration
                final ResultHeader header = enterEfa(pp);

                XmlPullUtil.enter(pp, "ci");

                XmlPullUtil.enter(pp, "request");
                XmlPullUtil.skipExit(pp, "request");

                final List<Location> stations = new ArrayList<>();

                if (XmlPullUtil.optEnter(pp, "pis")) {
                    while (XmlPullUtil.optEnter(pp, "pi")) {
                        final String name = normalizeLocationName(XmlPullUtil.optValueTag(pp, "de", null));
                        final String type = XmlPullUtil.valueTag(pp, "ty");
                        final LocationType locationType;
                        if ("STOP".equals(type))
                            locationType = LocationType.STATION;
                        else if ("POI_POINT".equals(type))
                            locationType = LocationType.POI;
                        else
                            throw new IllegalStateException("unknown type: " + type);

                        final String id = XmlPullUtil.valueTag(pp, "id");
                        XmlPullUtil.valueTag(pp, "omc");
                        XmlPullUtil.optValueTag(pp, "pid", null);
                        final String place = normalizeLocationName(XmlPullUtil.valueTag(pp, "locality"));
                        XmlPullUtil.valueTag(pp, "layer");
                        XmlPullUtil.valueTag(pp, "gisID");
                        XmlPullUtil.valueTag(pp, "ds");
                        XmlPullUtil.valueTag(pp, "stateless");
                        final Point coord = parseCoord(XmlPullUtil.valueTag(pp, "c"));

                        final Location location;
                        if (name != null)
                            location = new Location(locationType, id, coord, place, name);
                        else
                            location = new Location(locationType, id, coord, null, place);
                        stations.add(location);

                        XmlPullUtil.skipExit(pp, "pi");
                    }

                    XmlPullUtil.skipExit(pp, "pis");
                }

                XmlPullUtil.skipExit(pp, "ci");

                result.set(new NearbyLocationsResult(header, stations));
            } catch (final XmlPullParserException x) {
                throw new ParserException("cannot parse xml: " + bodyPeek, x);
            }
        }
    };

    if (httpPost)
        httpClient.getInputStream(callback, url.build(), url.build().encodedQuery(),
                "application/x-www-form-urlencoded", httpReferer);
    else
        httpClient.getInputStream(callback, url.build(), httpReferer);

    return result.get();
}