Examples with DocumentSnapshot com.google.cloud.firestore.DocumentSnapshot used on opensource projects

Example 31 with DocumentSnapshot

use of com.google.cloud.firestore.DocumentSnapshot in project java-firestore by googleapis.

the class ManageDataSnippets method runSimpleTransaction.

// [END firestore_data_delete_collection]
// [END fs_delete_collection]
/**
 * Run a simple transaction to perform a field value increment.
 *
 * @return transaction future
 */
ApiFuture<Void> runSimpleTransaction() throws Exception {
    // [START fs_run_simple_transaction]
    // [START firestore_transaction_document_update]
    // Initialize doc
    final DocumentReference docRef = db.collection("cities").document("SF");
    City city = new City("SF");
    city.setCountry("USA");
    city.setPopulation(860000L);
    docRef.set(city).get();
    // run an asynchronous transaction
    ApiFuture<Void> futureTransaction = db.runTransaction(transaction -> {
        // retrieve document and increment population field
        DocumentSnapshot snapshot = transaction.get(docRef).get();
        long oldPopulation = snapshot.getLong("population");
        transaction.update(docRef, "population", oldPopulation + 1);
        return null;
    });
    // [END fs_run_simple_transaction]
    return futureTransaction;
}

Example 32 with DocumentSnapshot

use of com.google.cloud.firestore.DocumentSnapshot in project java-firestore by googleapis.

the class ManageDataSnippets method returnInfoFromTransaction.

/**
 * Return information from a conditional transaction.
 *
 * @param population : set initial population.
 */
String returnInfoFromTransaction(long population) throws Exception {
    Map<String, Object> map = new HashMap<>();
    map.put("population", population);
    // Block until transaction is complete is using transaction.get()
    db.collection("cities").document("SF").set(map).get();
    // [START fs_return_info_transaction]
    // [START firestore_transaction_document_update_conditional]
    final DocumentReference docRef = db.collection("cities").document("SF");
    ApiFuture<String> futureTransaction = db.runTransaction(transaction -> {
        DocumentSnapshot snapshot = transaction.get(docRef).get();
        Long newPopulation = snapshot.getLong("population") + 1;
        // conditionally update based on current population
        if (newPopulation <= 1000000L) {
            transaction.update(docRef, "population", newPopulation);
            return "Population increased to " + newPopulation;
        } else {
            throw new Exception("Sorry! Population is too big.");
        }
    });
    // Print information retrieved from transaction
    System.out.println(futureTransaction.get());
    // [END fs_return_info_transaction]
    return futureTransaction.get();
}

Example 33 with DocumentSnapshot

use of com.google.cloud.firestore.DocumentSnapshot in project java-firestore by googleapis.

the class BaseIntegrationTest method deleteAllDocuments.

protected static void deleteAllDocuments(Firestore db) throws Exception {
    ApiFuture<QuerySnapshot> future = db.collection("cities").get();
    QuerySnapshot querySnapshot = future.get();
    for (DocumentSnapshot doc : querySnapshot.getDocuments()) {
        // block on delete operation
        db.collection("cities").document(doc.getId()).delete().get();
    }
}

Example 34 with DocumentSnapshot

use of com.google.cloud.firestore.DocumentSnapshot in project java-firestore by googleapis.

the class QuickstartIT method validate.

private void validate(DocumentReference docRef, Map<String, Object> data) throws Exception {
    DocumentSnapshot documentSnapshot = docRef.get().get();
    assertTrue(Objects.equals(documentSnapshot.getData(), data));
}

Example 35 with DocumentSnapshot

use of com.google.cloud.firestore.DocumentSnapshot in project java-firestore by googleapis.

the class ManageDataSnippetsIT method testUpdateDocumentIncrementSuccessful.

@Test
public void testUpdateDocumentIncrementSuccessful() throws Exception {
    manageDataSnippets.updateDocumentIncrement();
    CollectionReference collection = db.collection("cities");
    DocumentReference documentReference = collection.document("DC");
    final DocumentSnapshot data = documentReference.get().get();
    assertTrue(data.contains("population"));
    assertEquals((Long) 150L, data.getLong("population"));
}