private static void extractAndLoadLibrary()

in src/main/java/software/amazon/awssdk/crt/CRT.java [136:219]
69 lines of code
15 McCabe index (conditional complexity)

    private static void extractAndLoadLibrary(String path) {
        try {
            // Check java.io.tmpdir
            String tmpdirPath;
            File tmpdirFile;
            try {
                tmpdirFile = new File(path).getAbsoluteFile();
                tmpdirPath = tmpdirFile.getAbsolutePath();
                if (tmpdirFile.exists()) {
                    if (!tmpdirFile.isDirectory()) {
                        throw new IOException("not a directory: " + tmpdirPath);
                    }
                } else {
                    tmpdirFile.mkdirs();
                }

                if (!tmpdirFile.canRead() || !tmpdirFile.canWrite()) {
                    throw new IOException("access denied: " + tmpdirPath);
                }
            } catch (Exception ex) {
                String msg = "Invalid directory: " + path;
                throw new IOException(msg, ex);
            }

            // Prefix the lib
            String prefix = "AWSCRT_" + new Date().getTime();
            String libraryName = System.mapLibraryName(CRT_LIB_NAME);
            String libraryPath = "/" + getOSIdentifier() + "/" + getArchIdentifier() + "/" + libraryName;

            File tempSharedLib = File.createTempFile(prefix, libraryName, tmpdirFile);

            // open a stream to read the shared lib contents from this JAR
            try (InputStream in = CRT.class.getResourceAsStream(libraryPath)) {
                if (in == null) {
                    throw new IOException("Unable to open library in jar for AWS CRT: " + libraryPath);
                }

                if (tempSharedLib.exists()) {
                    tempSharedLib.delete();
                }

                // Copy from jar stream to temp file
                try (FileOutputStream out = new FileOutputStream(tempSharedLib)) {
                    int read;
                    byte [] bytes = new byte[1024];
                    while ((read = in.read(bytes)) != -1){
                        out.write(bytes, 0, read);
                    }
                }
            }

            if (!tempSharedLib.setExecutable(true)) {
                throw new CrtRuntimeException("Unable to make shared library executable");
            }
            if (!tempSharedLib.setWritable(false)) {
                throw new CrtRuntimeException("Unable to make shared library read-only");
            }
            if (!tempSharedLib.setReadable(true)) {
                throw new CrtRuntimeException("Unable to make shared library readable");
            }

            // Ensure that the shared lib will be destroyed when java exits
            tempSharedLib.deleteOnExit();

            // load the shared lib from the temp path
            System.load(tempSharedLib.getAbsolutePath());
        } catch (CrtRuntimeException crtex) {
            System.err.println("Unable to initialize AWS CRT: " + crtex);
            crtex.printStackTrace();
            throw crtex;
        } catch (UnknownPlatformException upe) {
            System.err.println("Unable to determine platform for AWS CRT: " + upe);
            upe.printStackTrace();
            CrtRuntimeException rex = new CrtRuntimeException("Unable to determine platform for AWS CRT");
            rex.initCause(upe);
            throw rex;
        } catch (Exception ex) {
            System.err.println("Unable to unpack AWS CRT lib: " + ex);
            ex.printStackTrace();
            CrtRuntimeException rex = new CrtRuntimeException("Unable to unpack AWS CRT library");
            rex.initCause(ex);
            throw rex;
        }
    }