How do I load and parse the JSON file serviceAccountKey.json?
thufir@doge:~/NetBeansProjects/mbaasFirebase$
thufir@doge:~/NetBeansProjects/mbaasFirebase$ gradle --stacktrace clean fatJar;java -jar build/libs/mbaasFirebase-all.jar
BUILD SUCCESSFUL in 14s
4 actionable tasks: 3 executed, 1 up-to-date
Jul 19, 2017 10:13:23 PM net.bounceme.dur.mbaas.firebase.Main main
INFO: mbaasFirebase starting..
Exception in thread "main" java.lang.NullPointerException
at net.bounceme.dur.mbaas.firebase.FirebaseConnection.query(FirebaseConnection.java:46)
at net.bounceme.dur.mbaas.firebase.FirebaseConnection.runQuery(FirebaseConnection.java:37)
at net.bounceme.dur.mbaas.firebase.Main.run(Main.java:22)
at net.bounceme.dur.mbaas.firebase.Main.main(Main.java:16)
thufir@doge:~/NetBeansProjects/mbaasFirebase$
thufir@doge:~/NetBeansProjects/mbaasFirebase$ cat src/
main/ test/
thufir@doge:~/NetBeansProjects/mbaasFirebase$ cat src/
main/ test/
thufir@doge:~/NetBeansProjects/mbaasFirebase$ cat src/main/
java/ resources/
thufir@doge:~/NetBeansProjects/mbaasFirebase$ cat src/main/
java/ resources/
thufir@doge:~/NetBeansProjects/mbaasFirebase$ cat src/main/java/net/bounceme/dur/mbaas/firebase/
FirebaseConnection.java PropertiesHelper.java User.java
Main.java UserHelper.java
thufir@doge:~/NetBeansProjects/mbaasFirebase$ cat src/main/java/net/bounceme/dur/mbaas/firebase/
FirebaseConnection.java PropertiesHelper.java User.java
Main.java UserHelper.java
thufir@doge:~/NetBeansProjects/mbaasFirebase$ cat src/main/java/net/bounceme/dur/mbaas/firebase/FirebaseConnection.java
package net.bounceme.dur.mbaas.firebase;
import com.google.firebase.FirebaseApp;
import com.google.firebase.FirebaseOptions;
import com.google.firebase.auth.FirebaseCredentials;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.URISyntaxException;
import java.util.Properties;
import java.util.concurrent.CountDownLatch;
import java.util.logging.Level;
import java.util.logging.Logger;
public class FirebaseConnection {
private static final Logger log = Logger.getLogger(FirebaseConnection.class.getName());
private DatabaseReference databaseReference = null;
private Properties firebaseProperties = null;
public FirebaseConnection() {
}
void setProperties(Properties firebaseProperties) {
this.firebaseProperties = firebaseProperties;
}
public void runQuery() {
try {
query();
} catch (IOException | InterruptedException | URISyntaxException ex) {
Logger.getLogger(FirebaseConnection.class.getName()).log(Level.SEVERE, null, ex);
}
}
private void query() throws FileNotFoundException, IOException, InterruptedException, URISyntaxException {
String url = firebaseProperties.getProperty("url");
log.fine(url);
FileInputStream serviceAccount = new FileInputStream(new File(getClass().getResource("serviceAccounteyKey.json").toURI()));
log.info(serviceAccount.toString());
FirebaseOptions options = new FirebaseOptions.Builder()
.setCredential(FirebaseCredentials.fromCertificate(serviceAccount))
.setDatabaseUrl(url)
.build();
FirebaseApp firebaseApp = FirebaseApp.initializeApp(options);
FirebaseDatabase firebaseDatabase = FirebaseDatabase.getInstance(firebaseApp, url);
databaseReference = firebaseDatabase.getReference().getRoot();
log.info(databaseReference.getKey());
CountDownLatch latch = new CountDownLatch(1);
databaseReference.addValueEventListener(new com.google.firebase.database.ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
String key = null;
String value = null;
for (DataSnapshot childSnapshot : dataSnapshot.getChildren()) {
key = childSnapshot.getKey();
value = (String) childSnapshot.getValue();
log.info(key + "\t\t" + value);
}
latch.countDown();
}
@Override
public void onCancelled(DatabaseError databaseError) {
latch.countDown();
throw databaseError.toException();
}
});
latch.await();
}
}
thufir@doge:~/NetBeansProjects/mbaasFirebase$
thufir@doge:~/NetBeansProjects/mbaasFirebase$ cd build/libs/
thufir@doge:~/NetBeansProjects/mbaasFirebase/build/libs$
thufir@doge:~/NetBeansProjects/mbaasFirebase/build/libs$ ll
total 6620
drwxrwxr-x 2 thufir thufir 4096 Jul 19 22:13 ./
drwxrwxr-x 6 thufir thufir 4096 Jul 19 22:13 ../
-rw-rw-r-- 1 thufir thufir 6768013 Jul 19 22:13 mbaasFirebase-all.jar
thufir@doge:~/NetBeansProjects/mbaasFirebase/build/libs$
thufir@doge:~/NetBeansProjects/mbaasFirebase/build/libs$ jar xf mbaasFirebase-all.jar
thufir@doge:~/NetBeansProjects/mbaasFirebase/build/libs$
thufir@doge:~/NetBeansProjects/mbaasFirebase/build/libs$ ll
total 6652
drwxrwxr-x 7 thufir thufir 4096 Jul 19 22:14 ./
drwxrwxr-x 6 thufir thufir 4096 Jul 19 22:13 ../
-rw-rw-r-- 1 thufir thufir 598 Jun 13 17:24 admin_sdk.properties
drwxrwxr-x 4 thufir thufir 4096 Jun 13 17:24 com/
-rw-rw-r-- 1 thufir thufir 37 Jul 19 22:13 firebase.properties
drwxrwxr-x 3 thufir thufir 4096 Jan 8 2009 javax/
-rw-rw-r-- 1 thufir thufir 6768013 Jul 19 22:13 mbaasFirebase-all.jar
drwxrwxr-x 4 thufir thufir 4096 Jul 19 22:13 META-INF/
drwxrwxr-x 3 thufir thufir 4096 Jul 19 22:13 net/
drwxrwxr-x 4 thufir thufir 4096 Aug 10 2016 org/
-rw-rw-r-- 1 thufir thufir 2338 Jul 19 22:13 serviceAccountKey.json
thufir@doge:~/NetBeansProjects/mbaasFirebase/build/libs$
thufir@doge:~/NetBeansProjects/mbaasFirebase/build/libs$
thufir@doge:~/NetBeansProjects/mbaasFirebase/build/libs$ head -n 2 serviceAccountKey.json
{
"type": "service_account",
thufir@doge:~/NetBeansProjects/mbaasFirebase/build/libs$
thufir@doge:~/NetBeansProjects/mbaasFirebase/build/libs$
see also:
Compiling Java Maven project in Netbeans causing app to not run
How do I correctly add the file input stream to my Firebase JSON file
