Integer() — netty Function Reference

Architecture documentation for the Integer() function in NetUtil.java from the netty codebase.

Function java CommonUtil Logging

Entity Profile

CommonUtil→ Logging→ Integer() — netty Function Reference

Dependency Diagram

graph TD
  c2e9d0e2_b1c8_ec6b_17db_f1e9120ac661["Integer()"]
  40fb3f7d_c2dd_316b_f965_bdef8e0dad94["NetUtil"]
  c2e9d0e2_b1c8_ec6b_17db_f1e9120ac661 -->|defined in| 40fb3f7d_c2dd_316b_f965_bdef8e0dad94
  style c2e9d0e2_b1c8_ec6b_17db_f1e9120ac661 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

common/src/main/java/io/netty/util/NetUtil.java lines 235–258

    private static Integer sysctlGetInt(String sysctlKey) throws IOException {
        Process process = new ProcessBuilder("sysctl", sysctlKey).start();
        try {
            // Suppress warnings about resource leaks since the buffered reader is closed below
            InputStream is = process.getInputStream();
            InputStreamReader isr = new InputStreamReader(new BoundedInputStream(is));
            try (BufferedReader br = new BufferedReader(isr)) {
                String line = br.readLine();
                if (line != null && line.startsWith(sysctlKey)) {
                    for (int i = line.length() - 1; i > sysctlKey.length(); --i) {
                        if (!Character.isDigit(line.charAt(i))) {
                            return Integer.valueOf(line.substring(i + 1));
                        }
                    }
                }
                return null;
            }
        } finally {
            // No need of 'null' check because we're initializing
            // the Process instance in first line. Any exception
            // raised will directly lead to throwable.
            process.destroy();
        }
    }