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import sys, os |
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import time |
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from datetime import datetime, timedelta |
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from obspy import UTCDateTime |
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from rsudp.raspberryshake import ConsumerThread |
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import rsudp.raspberryshake as rs |
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from rsudp import printM, printW, printE, helpers |
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import rsudp |
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class Write(rs.ConsumerThread): |
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""" |
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A simple routine to write daily miniSEED data to :code:`output_dir/data`. |
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:param cha: channel(s) to forward. others will be ignored. |
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:type cha: str or list |
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:param queue.Queue q: queue of data and messages sent by :class:`rsudp.c_consumer.Consumer` |
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:param bool debug: whether or not to display messages when writing data to disk. |
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""" |
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def __init__(self, q, debug=False, cha='all'): |
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""" |
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Initialize the process |
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""" |
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super().__init__() |
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self.sender = 'Write' |
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self.alive = True |
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self.queue = q |
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self.stream = rs.Stream() |
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self.outdir = rsudp.data_dir |
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self.debug = debug |
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self.chans = [] |
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helpers.set_channels(self, cha) |
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printM('Writing channels: %s' % self.chans, self.sender) |
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self.numchns = rs.numchns |
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self.stime = 1/rs.sps |
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self.inv = rs.inv |
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printM('Starting.', self.sender) |
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def getq(self): |
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''' |
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Reads data from the queue and updates the stream. |
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:rtype: bool |
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:return: Returns ``True`` if stream is updated, otherwise ``False``. |
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''' |
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d = self.queue.get(True, timeout=None) |
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self.queue.task_done() |
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if 'TERM' in str(d): |
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self.alive = False |
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printM('Exiting.', self.sender) |
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sys.exit() |
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elif 'ALARM' in str(d): |
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pass |
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else: |
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if rs.getCHN(d) in self.chans: |
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self.stream = rs.update_stream( |
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stream=self.stream, d=d, fill_value=None) |
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return True |
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else: |
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return False |
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def set_sps(self): |
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''' |
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Sets samples per second. |
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''' |
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self.sps = self.stream[0].stats.sampling_rate |
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def elapse(self, new=False): |
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''' |
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Ticks self variables over into a new day for file naming purposes. |
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:param bool new: If ``False``, the program is starting. If ``True``, the UTC date just elapsed. |
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''' |
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self.st = UTCDateTime.now() |
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self.y, self.m, self.d = self.st.year, self.st.month, self.st.day |
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self.j = self.st.strftime('%j') |
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self.newday = UTCDateTime(self.y, self.m, self.d, 0, 0) + timedelta(days=1.1) |
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self.newday = UTCDateTime(self.newday.year, self.newday.month, self.newday.day, 0, 0) |
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if new: |
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self.last = self.newday |
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else: |
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self.last = self.st |
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def slicestream(self): |
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''' |
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Causes the stream to slice down to the time the last write operation was made. |
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''' |
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self.stream.slice(starttime=self.last) |
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def write(self, stream=False): |
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''' |
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Writes a segment of the stream to disk as miniSEED, and appends it to the |
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file in question. If there is no file (i.e. if the program is just starting |
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or a new UTC day has just started, then this function writes to a new file). |
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:type stream: obspy.core.stream.Stream or bool |
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:param stream: The stream segment to write. If ``False``, the program has just started. |
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''' |
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if not stream: |
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self.last = self.stream[0].stats.endtime - timedelta(seconds=5) |
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stream = self.stream.copy().slice( |
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endtime=self.last, nearest_sample=False) |
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for t in stream: |
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enc = 'STEIM2' # encoding |
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if isinstance(t.data, rs.np.ma.masked_array): |
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t.data = t.data.filled(fill_value=0) # fill array (to avoid obspy write error) |
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outfile = self.outdir + '/%s.%s.00.%s.D.%s.%s' % (t.stats.network, |
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t.stats.station, t.stats.channel, self.y, self.j) |
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if os.path.exists(os.path.abspath(outfile)): |
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with open(outfile, 'ab') as fh: |
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if self.debug: |
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printM('Writing %s records to %s' |
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% (len(t.data), outfile), self.sender) |
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t.write(fh, format='MSEED', encoding=enc) |
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else: |
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if self.debug: |
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printM('Writing %s new file %s' |
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% (len(t.data), outfile), self.sender) |
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t.write(outfile, format='MSEED', encoding=enc) |
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def run(self): |
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""" |
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Reads packets and coordinates write operations. |
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""" |
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self.elapse() |
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self.getq() |
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self.set_sps() |
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self.getq() |
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printM('miniSEED output directory: %s' % (self.outdir), self.sender) |
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if self.inv: |
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printM('Writing inventory file: %s/%s.%s.00.xml' % (self.outdir, |
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self.stream[0].stats.network, |
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self.stream[0].stats.station), self.sender) |
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self.inv.write('%s/%s.%s.00.xml' % (self.outdir, |
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self.stream[0].stats.network, |
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self.stream[0].stats.station), |
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format='STATIONXML') |
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printM('Beginning miniSEED output.', self.sender) |
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wait_pkts = (self.numchns * 10) / (rs.tf / 1000) # comes out to 10 seconds (tf is in ms) |
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n = 0 |
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while True: |
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while True: |
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if self.queue.qsize() > 0: |
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self.getq() |
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time.sleep(0.01) # wait a few ms to see if another packet will arrive |
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n += 1 |
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else: |
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self.getq() |
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n += 1 |
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break |
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if n >= wait_pkts: |
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if self.newday < UTCDateTime.now(): # end of previous day and start of new day |
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self.write(self.stream.slice( |
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endtime=self.newday, nearest_sample=False)) |
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self.stream = self.stream.slice( |
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starttime=self.newday, nearest_sample=False) |
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self.elapse(new=True) |
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else: |
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self.write() |
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self.stream = self.stream.slice( |
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starttime=self.last, nearest_sample=False) |
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self.stream = rs.copy(self.stream) |
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n = 0 |
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self.getq() |
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time.sleep(0.01) # wait a few ms to see if another packet will arrive |
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sys.stdout.flush() |
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sys.stderr.flush() |
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raspishake /
rsudp
