private void doAllocateFile0() {
        final AbstractFile abstractFile = allocateNewAbstractFile();
        this.blankFiles.add(new AllocatedResult(abstractFile));
    }
Pre allocate abstractFile service
@author boyan(boyan@antfin.com), hzh (642256541@qq.com)
jraft-extension/java-log-storage-impl/src/main/java/com/alipay/sofa/jraft/storage/service/AllocateFileService.java