addSystemProperty(cmdList, "fess.log.level", null, null);
        } else {
            cmdList.add("-Dfess.log.level=" + logLevel);
        }
        stream(fessConfig.getJvmSuggestOptionsAsArray())
                .of(stream -> stream.filter(StringUtil::isNotBlank).forEach(value -> cmdList.add(value)));

        File ownTmpDir = null;
        final String tmpDir = System.getProperty("java.io.tmpdir");

        }

        @Override
        public String getJavaCommandPath() {
            return "java";
        }

        @Override
        public String[] getJvmSuggestOptionsAsArray() {
            return jvmSuggestOptions.isEmpty() ? new String[0] : jvmSuggestOptions.split(" ");
        }

        @Override
        public boolean isUseOwnTmpDir() {
            return useOwnTmpDir;

    default String[] getJvmCrawlerOptionsAsArray() {
        return JvmUtil.filterJvmOptions(getJvmCrawlerOptions().split("\n"));
    }

    String getJvmSuggestOptions();

    default String[] getJvmSuggestOptionsAsArray() {
        return JvmUtil.filterJvmOptions(getJvmSuggestOptions().split("\n"));
    }

    String getJvmThumbnailOptions();

    default String[] getJvmThumbnailOptionsAsArray() {