Example usage for com.amazonaws.util CollectionUtils isNullOrEmpty

Introduction

In this page you can find the example usage for com.amazonaws.util CollectionUtils isNullOrEmpty.

Prototype

public static <T> boolean isNullOrEmpty(Collection<T> collection) 

Source Link

Usage

From source file:org.duracloud.chunk.util.ChunksManifestVerifier.java

License:Apache License

/**
 * Verifies the bytes and checksums of the chunks specified in the manifest
 * match what is in DuraCloud and returns a listing of the chunks with a flag
 * indicating whether the check was successful as well as an error message if it
 * was not. You can use the result.isSuccess() method as a shortcut for determining
 * whether all the items in the manifest matched on another.
 *
 * @param spaceId/*  w  w w.java 2  s  .  co m*/
 * @param manifest
 * @return a list of results - one for each chunk.
 * @throws ContentStoreException
 */
public Results verifyAllChunks(String spaceId, ChunksManifest manifest) {

    Results results = new Results();
    for (ManifestEntry entry : manifest.getEntries()) {
        String chunkId = entry.getChunkId();
        String checksum = entry.getChunkMD5();
        long byteSize = entry.getByteSize();

        try {
            Map<String, String> props = this.contentStore.getContentProperties(spaceId, entry.getChunkId());
            String remoteChecksum = props.get(ContentStore.CONTENT_CHECKSUM);
            long remoteByteSize = Long.valueOf(props.get(ContentStore.CONTENT_SIZE));

            if (!checksum.equals(remoteChecksum)) {
                results.add(chunkId, "manifest checksum (" + checksum + ") does not match DuraCloud checksum ("
                        + remoteChecksum + ")", false);
            } else if (byteSize != remoteByteSize) {
                results.add(chunkId, "manifest byte size (" + byteSize
                        + ") does not match DuraCloud byte size (" + remoteByteSize + ")", false);
            } else {
                results.add(chunkId, null, true);
            }

        } catch (Exception ex) {
            results.add(chunkId, ex.getMessage(), false);
        }
    }

    if (CollectionUtils.isNullOrEmpty(results.get())) {
        throw new DuraCloudRuntimeException("failed to retrieve any chunks at list in chunk manifest:  "
                + spaceId + "/" + manifest.getManifestId());
    } else {
        return results;
    }
}

---