Java Code Examples for com.couchbase.client.java.Bucket#get()

public static void main(String[] args) {
    Cluster cluster = CouchbaseCluster.create(DefaultCouchbaseEnvironment
            .builder()
            .queryEnabled(true)
            .build());

    Bucket defaultBucket = cluster.openBucket("default");
    defaultBucket.remove("user:walter");

    JsonArray friends = JsonArray.empty()
            .add(JsonObject.empty().put("name", "Mike Ehrmantraut"))
            .add(JsonObject.empty().put("name", "Jesse Pinkman"));

    JsonObject content = JsonObject.empty()
            .put("firstname", "Walter")
            .put("lastname", "White")
            .put("age", 52)
            .put("aliases", JsonArray.from("Walt Jackson", "Mr. Mayhew", "David Lynn"))
            .put("friends", friends);
    JsonDocument walter = JsonDocument.create("user:walter", content);
    JsonDocument inserted = defaultBucket.insert(walter);

    JsonDocument foundGuy = defaultBucket.get("user:walter");
    System.out.println(foundGuy.content().toMap());


    Bucket beerBucket = cluster.openBucket("beer-sample");
    N1qlQueryResult result = beerBucket.query(N1qlQuery.simple(select("*").from(i("beer-sample")).limit(10)));

    System.out.println("Errors found: " + result.errors());

    for (N1qlQueryRow row : result.allRows()) {
        JsonObject jsonObject = row.value();
        System.out.println(jsonObject.toMap());
    }

    cluster.disconnect();
}
 

/**
 * A convenient method to retrieve String value when Document type is unknown.
 * This method uses LegacyDocument to get, then tries to convert content based on its class.
 * @param bucket the bucket to get a document
 * @param id the id of the target document
 * @return String representation of the stored value, or null if not found
 */
public static String getStringContent(Bucket bucket, String id) {
    final LegacyDocument doc = bucket.get(LegacyDocument.create(id));
    if (doc == null) {
        return null;
    }
    final Object content = doc.content();
    return getStringContent(content);
}
 

@Override
public List<JsonDocument> getDocuments(Bucket bucket, Iterable<String> keys) {
    List<JsonDocument> docs = new ArrayList<>();
    for (String key : keys) {
        JsonDocument doc = bucket.get(key);
        if (doc != null) {
            docs.add(doc);
        }
    }
    return docs;
}
 

static JsonDocument retrieveAndUpsertExample(Bucket bucket, String id) {
    JsonDocument document = bucket.get(id);
    JsonObject content = document.content();
    content.put("homeTown", "Kansas City");
    JsonDocument upserted = bucket.upsert(document);
    return upserted;
}
 

static JsonDocument replaceExample(Bucket bucket, String id) {
    JsonDocument document = bucket.get(id);
    JsonObject content = document.content();
    content.put("homeTown", "Milwaukee");
    JsonDocument replaced = bucket.replace(document);
    return replaced;
}
 

static JsonDocument getFirstFromReplicaExample(Bucket bucket, String id) {
    try {
        return bucket.get(id);
    } catch (CouchbaseException e) {
        List<JsonDocument> list = bucket.getFromReplica(id, ReplicaMode.FIRST);
        if (!list.isEmpty()) {
            return list.get(0);
        }
    }
    return null;
}
 

@Ignore("This test method requires a live Couchbase Server instance")
@Test
public void testDocumentTypesAndStringConversion() {
    final CouchbaseCluster cluster = CouchbaseCluster.fromConnectionString("couchbase://192.168.99.100:8091");
    final Bucket bucket = cluster.openBucket("b1", "b1password");

    bucket.upsert(JsonDocument.create("JsonDocument", JsonObject.create().put("one", 1)));
    bucket.upsert(JsonArrayDocument.create("JsonArray", JsonArray.create().add(1).add(2).add(3)));
    bucket.upsert(JsonDoubleDocument.create("JsonDouble", 0.123));
    bucket.upsert(JsonStringDocument.create("JsonString", "value"));
    bucket.upsert(JsonBooleanDocument.create("JsonBoolean", true));
    bucket.upsert(JsonLongDocument.create("JsonLong", 123L));

    bucket.upsert(RawJsonDocument.create("RawJsonDocument", "value"));
    bucket.upsert(StringDocument.create("StringDocument", "value"));

    bucket.upsert(BinaryDocument.create("BinaryDocument", Unpooled.copiedBuffer("value".getBytes(StandardCharsets.UTF_8))));
    bucket.upsert(ByteArrayDocument.create("ByteArrayDocument", "value".getBytes(StandardCharsets.UTF_8)));

    final String[][] expectations = {
            {"JsonDocument", "String", "{\"one\":1}"},
            {"JsonArray", "String", "[1,2,3]"},
            {"JsonDouble", "String", "0.123"},
            {"JsonString", "String", "\"value\""},
            {"JsonBoolean", "String", "true"},
            {"JsonLong", "String", "123"},
            {"RawJsonDocument", "String", "value"},
            {"StringDocument", "String", "value"},
            {"BinaryDocument", "byte[]", "value"},
            {"ByteArrayDocument", "byte[]", "value"},
    };

    for (String[] expectation : expectations) {
        final LegacyDocument document = bucket.get(LegacyDocument.create(expectation[0]));
        assertEquals(expectation[1], document.content().getClass().getSimpleName());
        assertEquals(expectation[2], CouchbaseUtils.getStringContent(document.content()));
    }

    final BinaryDocument binaryDocument = bucket.get(BinaryDocument.create("BinaryDocument"));
    final String stringFromByteBuff = CouchbaseUtils.getStringContent(binaryDocument.content());
    assertEquals("value", stringFromByteBuff);

    try {
        bucket.get(BinaryDocument.create("JsonDocument"));
        fail("Getting a JSON document as a BinaryDocument fails");
    } catch (TranscodingException e) {
        assertTrue(e.getMessage().contains("Flags (0x2000000) indicate non-binary document for id JsonDocument"));
    }

}