public OutputStream getOutput(String pathname, boolean append, int chunk_size)
throws IOException {
GridFile file = (GridFile) getFile(pathname, chunk_size);
if (!file.createNewFile()) throw new IOException("creation of " + pathname + " failed");
return new GridOutputStream(file, append, data, chunk_size);
}
public void testDeleteRemovesAllChunks() throws Exception {
assertEquals(numberOfChunksInCache(), 0);
assertEquals(numberOfMetadataEntries(), 0);
writeToFile("delete.txt", "delete me", 100);
GridFile file = (GridFile) fs.getFile("delete.txt");
boolean deleted = file.delete();
assertTrue(deleted);
assertFalse(file.exists());
assertEquals(numberOfChunksInCache(), 0);
assertEquals(numberOfMetadataEntries(), 0);
}
public void testWriteAcrossMultipleChunksWithNonDefaultChunkSizeAfterFileIsExplicitlyCreated()
throws Exception {
GridFile file = (GridFile) fs.getFile("multipleChunks.txt", 20); // chunkSize = 20
file.createNewFile();
writeToFile(
"multipleChunks.txt",
"This text spans multiple chunks, because each chunk is only 20 bytes long.",
10); // chunkSize = 10 (but it is ignored, because the file was already created with
// chunkSize = 20
String text = getContents("multipleChunks.txt");
assertEquals(
text, "This text spans multiple chunks, because each chunk is only 20 bytes long.");
}
GridInputStream(GridFile file, Cache<String, byte[]> cache, int chunk_size)
throws FileNotFoundException {
this.file = file;
this.name = file.getPath();
this.cache = cache;
this.chunk_size = chunk_size;
}
public InputStream getInput(String pathname) throws FileNotFoundException {
GridFile file = (GridFile) getFile(pathname);
if (!file.exists()) throw new FileNotFoundException(pathname);
return new GridInputStream(file, data, default_chunk_size);
}
public OutputStream getOutput(GridFile file) throws IOException {
if (!file.createNewFile()) throw new IOException("creation of " + file + " failed");
return new GridOutputStream(file, false, data, default_chunk_size);
}
private String getChunkKey(int chunkNumber) {
return getChunkKey(file.getAbsolutePath(), chunkNumber);
}
public int getChunkSize() {
return file.getChunkSize();
}