private boolean verifyExistingResourceFiles()

in java/main/src/main/java/com/epam/deltix/utilities/ResourceLoader.java [739:799]
39 lines of code
15 McCabe index (conditional complexity)

    private boolean verifyExistingResourceFiles(final Path deploymentPath) throws IOException {

        // Verify automatically fails if overwrite mode is forced
        if (_alwaysOverwrite)
            return false;

        // Make sure all resource files are closed
        if (!_reusePartiallyDeployed)
            disposeResourceFiles();

        int timeout = _retryTimeoutMs;
        final int numExpected = _resources.size();

        do {
            int numFound = 0, numOpened = 0;
            for (final Resource resource : _resources) {
                final Path filePath = resource.getFullPath(deploymentPath);
                if (Files.exists(filePath)) {
                    ++numFound;
                    if (null == resource.getFile()) {
                        try {
                            resource.setReadLock(filePath);
                        } catch (final IOException e) {
                            continue;
                        }

                        if (_verifyContent || _verifyLength) {
                            // TODO: File verification checks will go here. Currently we don't store the necessary metadata
                        }
                    }

                    ++numOpened;
                }
            }

            // Nothing found? Fail immediately
            if (0 == numFound)
                break;

            // All found? Return success
            if (numOpened == numExpected)
                return true;

            // Able to open some of the files
            if (numOpened == numFound)
                break;

            // If there is a lock file, fail
            if (FileJanitor.lockFileExists(deploymentPath))
                break;

            // Ok, we can't open _some_ of the files we found and there is no lock file. Probably being written, but not by this class.
            // Wait and retry until timeout
            timeout -= randomSleep(timeout);
        } while (timeout > 0);

        if (!_reusePartiallyDeployed)
            disposeResourceFiles();

        return false;
    }