/
GraphHopperLocalHub.java
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/
GraphHopperLocalHub.java
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package org.teavm.graphhopper.hub;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import org.teavm.graphhopper.indexeddb.Cursor;
import org.teavm.graphhopper.indexeddb.Database;
import org.teavm.graphhopper.indexeddb.StoreParameters;
import org.teavm.graphhopper.indexeddb.Transaction;
import org.teavm.graphhopper.indexeddb.TransactionMode;
import org.teavm.graphhopper.util.IndexedDBFile;
import org.teavm.graphhopper.util.IndexedDBFileSystem;
import static org.teavm.graphhopper.hub.EventLoop.requireEventLoop;
import static org.teavm.graphhopper.hub.EventLoop.submit;
/**
*
* @author Alexey Andreev
*/
public class GraphHopperLocalHub {
private IndexedDBFileSystem fs;
private Map<String, GraphHopperLocalMap> maps = new HashMap<>();
private Set<String> uploadingMaps = new HashSet<>();
private Database database;
public GraphHopperLocalHub() {
this("graphhopper");
}
public GraphHopperLocalHub(String name) {
fs = new IndexedDBFileSystem(name + "-fs");
database = Database.open(name, 1, (database, oldVersion, newVersion) -> createSchema(database));
try (Transaction tx = database.begin("maps")) {
for (Cursor cursor = tx.store("maps").openCursor(); cursor.hasNext(); cursor.next()) {
GraphHopperLocalMap map = (GraphHopperLocalMap)cursor.getValue();
maps.put(map.getId(), map);
}
}
}
private void createSchema(Database database) {
database.createStore("maps", new StoreParameters().setKeyPath("id"));
}
public GraphHopperLocalMap[] getMaps() {
requireEventLoop();
return maps.values().toArray(new GraphHopperLocalMap[0]);
}
public GraphHopperLocalMap getMap(String id) {
requireEventLoop();
return maps.get(id);
}
public InputStream download(String id) throws IOException {
requireEventLoop();
if (!maps.containsKey(id)) {
return null;
}
if (uploadingMaps.contains(id)) {
throw new IllegalStateException("Map is not uploaded yet");
}
GraphHopperLocalMap map = maps.get(id);
if (map == null) {
return null;
}
return fs.file(id).read();
}
public boolean hasMap(String id) {
requireEventLoop();
return maps.containsKey(id);
}
public boolean isUploading(String id) {
requireEventLoop();
return uploadingMaps.contains(id);
}
public void deleteMap(String id) {
requireEventLoop();
if (maps.containsKey(id)) {
fs.file(id).delete();
maps.remove(id);
uploadingMaps.remove(id);
}
}
public void upload(final GraphHopperLocalMap map, final GraphHopperMapReader reader,
GraphHopperMapUploadListener listener) {
requireEventLoop();
if (!uploadingMaps.add(map.getId())) {
throw new IllegalStateException("Already uploading map " + map.getId());
}
maps.put(map.getId(), map);
new Thread(() -> {
IndexedDBFile file = null;
try {
file = fs.file(map.getId());
file.clear();
int pos = 0;
while (true) {
byte[] chunk = reader.next();
if (chunk == null) {
break;
}
file.append(chunk);
pos += chunk.length;
int bytesUploaded = pos;
submit(() -> listener.progress(bytesUploaded));
}
} catch (Exception e) {
try {
if (file != null) {
file.delete();
}
} catch (Exception e2) {
// Ignore
}
submit(() -> {
if (uploadingMaps.remove(map.getId())) {
listener.failed(e);
} else {
listener.complete();
}
});
return;
}
try (Transaction tx = database.begin(TransactionMode.READ_WRITE, "maps")) {
tx.store("maps").put(map);
}
submit(() -> {
uploadingMaps.remove(map.getId());
listener.complete();
});
}, "upload-" + map.getId()).start();
}
}