func TestQueueStorePut(t *testing.T) {
	defer func() {
		if err := tearDownQueueStore(); err != nil {
			t.Fatal("Failed to tear down store ", err)
		}
	}()
	store, err := setUpQueueStore(queueDir, 100)
	if err != nil {
		t.Fatal("Failed to create a queue store ", err)
	}
	// Put 100 items.
	for i := 0; i < 100; i++ {
		if err := store.Put(testItem); err != nil {
			t.Fatal("Failed to put to queue store ", err)

func (target *ElasticsearchTarget) Name() string {
	return target.ID().String()
}

// Store returns any underlying store if set.
func (target *ElasticsearchTarget) Store() event.TargetStore {
	return target.store
}

// IsActive - Return true if target is up and active
func (target *ElasticsearchTarget) IsActive() (bool, error) {
	if err := target.init(); err != nil {
		return false, err
	}

// Name - returns the Name of the target.
func (target *RedisTarget) Name() string {
	return target.ID().String()
}

// Store returns any underlying store if set.
func (target *RedisTarget) Store() event.TargetStore {
	return target.store
}

// IsActive - Return true if target is up and active
func (target *RedisTarget) IsActive() (bool, error) {
	if err := target.init(); err != nil {
		return false, err
	}

	store.RLock()
	l := len(store.entries)
	defer store.RUnlock()
	return l
}

// lockless call
func (store *QueueStore[_]) del(key string) error {
	err := os.Remove(filepath.Join(store.directory, key+store.fileExt))

	// Delete as entry no matter the result
	delete(store.entries, key)

	return err
}

// List - lists all files registered in the store.

	"net/http"

	"github.com/minio/minio/internal/hash"
)

var errConfigNotFound = errors.New("config file not found")

func readConfigWithMetadata(ctx context.Context, store objectIO, configFile string, opts ObjectOptions) ([]byte, ObjectInfo, error) {
	r, err := store.GetObjectNInfo(ctx, minioMetaBucket, configFile, nil, http.Header{}, opts)
	if err != nil {
		if isErrObjectNotFound(err) {
			return nil, ObjectInfo{}, errConfigNotFound
		}

		return err
	}

	// Delete the event from store.
	return target.store.Del(key.Name)
}

// Save - saves the events to the store if queuestore is configured, which will
// be replayed when the mqtt connection is active.
func (target *MQTTTarget) Save(eventData event.Event) error {
	if target.store != nil {
		return target.store.Put(eventData)
	}
	if err := target.init(); err != nil {
		return err
	}

        return getProperties().size();
    }

    @Override
    public void store(final OutputStream out, final String comments) throws IOException {
        getProperties().store(out, comments);
    }

    @Override
    public void store(final Writer writer, final String comments) throws IOException {
        getProperties().store(writer, comments);
    }

    @Override

    /**
     * {@link Properties#store(OutputStream, String)}の例外処理をラップします。
     *
     * <p>
     * 出力ストリームはクローズされません。
     * </p>
     *
     * @param props
     *            プロパティセット。{@literal null}であってはいけません
     * @param out
     *            出力ストリーム。{@literal null}であってはいけません
     * @param comments
     *            コメント
     */

	connMutex  sync.Mutex
	store      store.Store[event.Event]
	loggerOnce logger.LogOnce

	quitCh chan struct{}
}

// ID - returns TargetID.
func (target *AMQPTarget) ID() event.TargetID {
	return target.id
}

// Name - returns the Name of the target.
func (target *AMQPTarget) Name() string {
	return target.ID().String()
}

// Store returns any underlying store if set.

}

// Name - returns the Name of the target.
func (target *PostgreSQLTarget) Name() string {
	return target.ID().String()
}

// Store returns any underlying store if set.
func (target *PostgreSQLTarget) Store() event.TargetStore {
	return target.store
}

// IsActive - Return true if target is up and active
func (target *PostgreSQLTarget) IsActive() (bool, error) {
	if err := target.init(); err != nil {