// Factory methods:
public static MemoStorable load(Entity ent) {
// long start = System.currentTimeMillis();
byte[] result;
Key key = ent.getKey();
int size = 0;
long spread = 0;
// int count=0;
try {
Blob blob = (Blob) ent.getProperty("payload");
size = (int) ((Long) ent.getProperty("size") % Integer.MAX_VALUE);
spread = ((Long) ent.getProperty("spread"));
byte[] data = blob.getBytes();
result = Arrays.copyOf(data, data.length);
// count++;
while (ent.hasProperty("next")) {
// Expensive, should not be used too much!
Key next = (Key) ent.getProperty("next");
ent = datastore.get(next);
blob = (Blob) ent.getProperty("payload");
data = blob.getBytes();
result = concat(data, result); // Add to front of result, due to
// count++; // the storing order
}
} catch (EntityNotFoundException e) {
e.printStackTrace();
return null;
}
MemoStorable res = _unserialize(result, size);
res.spread = spread;
res.storedSize = result.length;
if (res != null) res.myKey = key;
return res;
}
/**
* Executes a background task.
*
* <p>The task payload is either type Deferrable or Key; in the latter case, retrieve (then
* delete) the Deferrable instance from the datastore.
*/
@Override
public void doPost(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
try {
Object payload = deserialize(req);
if (payload instanceof Key) {
// get Deferrable from datastore
Blob taskBlob = (Blob) getDatastoreService().get((Key) payload).getProperty(TASK_PROPERTY);
deleteEntity((Key) payload);
if (taskBlob != null) {
payload = deserialize(taskBlob.getBytes());
}
}
if (payload instanceof Deferrable) {
((Deferrable) payload).doTask();
} else if (payload != null) {
log.severe("invalid payload type: " + payload.getClass().getName());
// don't retry task
}
} catch (EntityNotFoundException e) {
log.severe(e.toString()); // don't retry task
} catch (PermanentTaskFailure e) {
log.severe(e.toString()); // don't retry task
}
}
public InputStream getInputStream() throws IOException {
ByteArrayInputStream bais;
if (content != null) {
bais = new ByteArrayInputStream(content.getBytes());
} else {
bais = new ByteArrayInputStream(content_out.toByteArray());
}
return bais;
}
public Object process() throws xMethodException {
int width = 2, height = 2;
try {
width = Integer.parseInt(getArguments("w"));
} catch (Exception e) {
}
try {
height = Integer.parseInt(getArguments("h"));
} catch (Exception e) {
}
int color = 0xffffff;
try {
color = Integer.parseInt(getArguments("c"), 16);
} catch (Exception e) {
}
int border_color = color;
try {
border_color = Integer.parseInt(getArguments("bc"), 16);
} catch (Exception e) {
}
float opaque = 1f;
try {
opaque = Float.parseFloat(getArguments("o"));
} catch (Exception e) {
}
int rc = -1;
try {
rc = Integer.parseInt(getArguments("rc"));
} catch (Exception e) {
}
byte[] pngbytes = null;
StringBuffer memkey = new StringBuffer();
memkey
.append(width)
.append(height)
.append(color)
.append(border_color)
.append(rc)
.append(opaque);
Blob blob = (Blob) xMemCache.pngService().get(memkey);
if (blob != null) pngbytes = blob.getBytes();
if (pngbytes == null || pngbytes.length == 0) {
pngPixelSource ps = new pngPixelSource(width, height, color, border_color, rc, opaque);
try {
pngbytes = new PngWriter().generateImage(ps);
xMemCache.pngService().put(memkey, new Blob(pngbytes));
} catch (IOException e) {
e.printStackTrace();
}
}
//
HttpServletResponse response = getServiceContext().customizeResponse();
response.setHeader("Cache-Control", "no-cache");
response.setContentType("image/png");
try {
response.getOutputStream().write(pngbytes);
} catch (IOException ioe) {
ioe.printStackTrace();
throw createMethodException("QrcodeException", ioe.getLocalizedMessage());
}
//
return getServiceContext().doNextProcess();
}
public long getSize() {
return (content != null) ? content.getBytes().length : content_out.size();
}
public byte[] get() {
return (content != null) ? content.getBytes() : content_out.toByteArray();
}
public String getString(String arg0) throws UnsupportedEncodingException {
return (content != null)
? new String(content.getBytes(), arg0)
: new String(content_out.toByteArray(), arg0);
}
public String getString() {
return (content != null)
? new String(content.getBytes())
: new String(content_out.toByteArray());
}
/** @return the xml */
public byte[] getXml() {
if (xml == null) return null;
return xml.getBytes();
}
public byte[] getBytes() {
return blob.getBytes();
}
public byte[] getImage() {
if (image == null) return null;
return image.getBytes();
}