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MosaicWorker.py
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MosaicWorker.py
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import requests
import random
import concurrent
import queue
class MosaicWorker:
def __init__(self, baseImage, tilesAcross, renderedTileSize, fileFormat, socketio, servers, threadPool, socketio_filter = ""):
self.baseImage = baseImage
self.tilesAcross = tilesAcross
self.renderedTileSize = renderedTileSize
self.fileFormat = fileFormat
self.socketio = socketio
self.servers = servers
self.socketio_filter = socketio_filter
self.mmgsAvailable = []
self.reducersAvailable = []
self.reductionJobs = []
self.reducerBlockingQueue = queue.Queue()
self.mmgTasks = []
self.reducerTasks = []
self.mmgCompleted = 0
self.reducerCompleted = 0
self.mosaicNextID = 1
self.expectedMosaics = -1 # Always (2*MG - 1) mosaics w/ reductions; start with -1 and always add 2.
self.disableReduce = False
self.threadPool = threadPool
def addMMG(self, mmg):
self.mmgsAvailable.append(mmg)
self.expectedMosaics += 2
def addReducer(self, reducer):
self.reducersAvailable.append(reducer)
def getImageSize(self, imageBuffer):
import struct
import io
from PIL import Image
## Check if PNG, just read from IHDR:
if imageBuffer[0] == 137 and imageBuffer[1] == 80:
width, height = struct.unpack('>ii', imageBuffer[16:24])
## Otherwise, use PIL:
else:
img = Image.open(io.BytesIO(imageBuffer))
width = img.width
height = img.height
return width, height
def validateMosaicImageSize(self, server, baseImage, mosaicImage):
try:
baseWidth, baseHeight = self.getImageSize(baseImage)
mosaicWidth, mosaicHeight = self.getImageSize(mosaicImage)
except Exception as e:
self.servers.updateValue(server, "error", f"Image Error: {e}")
return False
d = baseWidth / self.tilesAcross
verticalTiles = int(baseHeight / d)
requiredWidth = int(self.tilesAcross * self.renderedTileSize)
requiredHeight = int(verticalTiles * self.renderedTileSize)
if mosaicWidth != requiredWidth or mosaicHeight != requiredHeight:
self.servers.updateValue(server, "error", f"Invalid mosaic image size: required ({requiredWidth} x {requiredHeight}), but mosaic was ({mosaicWidth}, {mosaicHeight})")
return False
return True
def saveImage(self, info):
import time
import os
fileName = os.path.join("mosaics", f"{int(time.time() * 1000)}_{info['tiles']}_{info['mosaics']}.{self.fileFormat.lower()}")
with open(fileName, "wb") as f:
f.write(info["mosaicImage"])
def processRenderedMosaic(self, mosaicImage, description, tiles, mosaics):
"""Stores a rendered mosaic, queueing up reduction or further reduction if possible."""
print(f"[MosaicWorker]: --> Storing mosaic result as #{self.mosaicNextID}")
mosaicInfo = {
"image": mosaicImage,
"id": self.mosaicNextID,
"description": description,
"tiles": tiles,
"mosaics": mosaics,
}
self.socketio.emit("mosaic" + self.socketio_filter, mosaicInfo)
import random
if random.randint(1, 100) == 100:
self.saveImage(mosaicInfo)
self.reductionJobs.append({
"mosaicImage": mosaicImage,
"id": self.mosaicNextID,
"tiles": tiles,
"mosaics": mosaics,
"description": description,
})
self.socketio.emit("progress update" + self.socketio_filter, {
"current": self.mosaicNextID,
"total": self.expectedMosaics,
})
self.mosaicNextID = self.mosaicNextID + 1
if len(self.reductionJobs) >= 2 and not self.disableReduce:
mosaic1 = self.reductionJobs.pop()
mosaic2 = self.reductionJobs.pop()
reducerTask = self.threadPool.submit(self.awaitReducer, mosaic1, mosaic2)
self.reducerTasks.append(reducerTask)
def sendRequest2(self, url, files):
resp = requests.post(
f'{url}?tilesAcross={self.tilesAcross}&renderedTileSize={self.renderedTileSize}&fileFormat={self.fileFormat}',
files = files,
timeout = 15,
)
return resp
def awaitReducer(self, mosaic1, mosaic2):
if len(self.reducersAvailable) == 0:
raise Exception("No reducers are available on this server.")
print(f'[MosaicWorker]: Sending reduce request for #{mosaic1["id"]} and #{mosaic2["id"]}')
reducer = self.reducerBlockingQueue.get()
url = reducer["url"]
print(f'[MosaicWorker]: url: {url}, queue: {self.reducerBlockingQueue.qsize()}')
req = None
try:
req = self.sendRequest2(url, files = {"baseImage": self.baseImage, "mosaic1": mosaic1["mosaicImage"], "mosaic2": mosaic2["mosaicImage"]})
except Exception as e:
self.servers.updateValue(reducer, "error", f"ConnectionError: {e}")
self.servers.updateValue(reducer, "disabled", True)
# Remove bad reducer and retry:
if reducer in self.reducersAvailable:
self.reducersAvailable.remove(reducer)
return self.awaitReducer(mosaic1, mosaic2)
if req.status_code >= 500:
self.servers.updateValue(reducer, "error", f"HTTP Status {req.status_code}")
self.servers.updateValue(reducer, "disabled", True)
# Remove bad reducer and retry:
if reducer in self.reducersAvailable:
self.reducersAvailable.remove(reducer)
return self.awaitReducer(mosaic1, mosaic2)
if req.status_code != 200:
self.servers.updateValue(reducer, "error", f"HTTP Status {req.status_code}")
# Remove bad reducer and retry:
if reducer in self.reducersAvailable:
self.reducersAvailable.remove(reducer)
return self.awaitReducer(mosaic1, mosaic2)
mosaicImage = req.content
if not self.validateMosaicImageSize(reducer, self.baseImage, mosaicImage):
self.servers.updateValue(reducer, "disabled", True)
# Remove bad reducer and retry:
if reducer in self.reducersAvailable:
self.reducersAvailable.remove(reducer)
return self.awaitReducer(mosaic1, mosaic2)
self.reducerBlockingQueue.put(reducer)
print(f'[MosaicWorker]: completed, queue: {self.reducerBlockingQueue.qsize()}')
self.processRenderedMosaic(
mosaicImage,
f'Reduction of #{mosaic1["id"]} and #{mosaic2["id"]} by {reducer["author"]}',
mosaic1["tiles"] + mosaic2["tiles"],
mosaic1["mosaics"] + mosaic2["mosaics"],
)
self.reducerCompleted = self.reducerCompleted + 1
if self.socketio_filter == "":
self.servers.updateCount(reducer)
def awaitMMG(self, mmg):
url = mmg["url"]
name = mmg["name"]
author = mmg["author"]
print(f"[MosaicWorker]: Sending MMG request to \"{name}\" by {author} at {url}")
try:
req = self.sendRequest2(url, files={"image": self.baseImage})
except Exception as e:
self.servers.updateValue(mmg, "error", f"ConnectionError: {e}")
self.servers.updateValue(mmg, "disabled", True)
self.expectedMosaics -= 2
return
if req.status_code >= 500:
self.servers.updateValue(mmg, "disabled", True)
if req.status_code != 200:
self.servers.updateValue(mmg, "error", f"HTTP Status {req.status_code}")
self.expectedMosaics -= 2
return
mosaicImage = req.content
if not self.validateMosaicImageSize(mmg, self.baseImage, mosaicImage):
self.expectedMosaics -= 2
return
self.processRenderedMosaic(mosaicImage, f"\"{name}\" by {author}", mmg["tiles"], 1)
self.mmgCompleted = self.mmgCompleted + 1
if self.socketio_filter == "":
self.servers.updateCount(mmg)
def createMosaic(self):
if len(self.mmgsAvailable) == 0:
raise Exception("No MMGs are available on this server.")
for reducer in self.reducersAvailable:
self.reducerBlockingQueue.put(reducer)
random.shuffle(self.mmgsAvailable)
for mmg in self.mmgsAvailable:
mmgFuture = self.threadPool.submit(self.awaitMMG, mmg)
self.mmgTasks.append(mmgFuture)
concurrent.futures.wait(self.mmgTasks)
if len(self.reducersAvailable) == 0:
raise Exception("No reducers are available on this server.")
concurrent.futures.wait(self.reducerTasks)
while self.mosaicNextID <= self.expectedMosaics:
concurrent.futures.wait(self.reducerTasks)
# After all MMGs and reducers, there should be one mosaic that remains to be reduced that cannot
# be reduced with anything else. This is the final result:
# if len(self.allRenderedMosaics) > 0:
# for d in self.allRenderedMosaics:
# d["image"] = "data:image/png;base64," + base64.b64encode(d["image"]).decode("utf-8")
# return self.allRenderedMosaics
if len(self.reductionJobs) == 1:
self.saveImage(self.reductionJobs[0])
return []
# Otherwise, we have some sort of an error:
raise Exception("No mosaics were available after all threads completed all of the work. (Did every MMG fail?)")
def testMosaic(self):
if len(self.mmgsAvailable) == 0:
raise Exception("No MMGs are available for this author.")
self.disableReduce = True
for mmg in self.mmgsAvailable:
mmgFuture = self.threadPool.submit(self.awaitMMG, mmg)
self.mmgTasks.append(mmgFuture)
concurrent.futures.wait(self.mmgTasks)
# for t in concurrent.futures.as_completed(self.mmgTasks):
# print(t)
return []
def testReduction(self, mosaic1, mosaic2, mosaic3, mosaic4):
if len(self.reducersAvailable) == 0:
raise Exception("No reducers are available for this author.")
for reducer in self.reducersAvailable:
self.reducerBlockingQueue.put(reducer)
m1 = { "id": "A", "mosaicImage": mosaic1, "tiles": -1, "mosaics": -1 }
m2 = { "id": "B", "mosaicImage": mosaic2, "tiles": -1, "mosaics": -1 }
m3 = { "id": "C", "mosaicImage": mosaic3, "tiles": -1, "mosaics": -1 }
m4 = { "id": "D", "mosaicImage": mosaic4, "tiles": -1, "mosaics": -1 }
reducerFuture = self.threadPool.submit(self.awaitReducer, m1, m2)
self.reducerTasks.append(reducerFuture)
reducerFuture = self.threadPool.submit(self.awaitReducer, m3, m4)
self.reducerTasks.append(reducerFuture)
concurrent.futures.wait(self.reducerTasks)
return []