GraphiteRenderPlain.process() - Code Metrics - Inspection of "-removed influxdb code due to changes to Render cl..." - s4z/plumd - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( da3b73...3279ec )

by Kenny

created 2016-07-30 16:12 UTC

GraphiteRenderPlain.process() C

↳ Parent: GraphiteRenderPlain

Complexity

Conditions

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	1	Features	1

Metric	Value
cc	7
c	1
b	1
f	1
dl	0
loc	41
rs	5.5

 # -*- coding: utf-8 -*-

__author__ = 'Kenny Freeman'
__email__ = '[email protected]'
__license__ = "ISCL"
__docformat__ = 'reStructuredText'

import sys
import time
import struct
import socket

import plumd
import plumd.util
import plumd.plugins


def format_meta(meta, sep):
    """Return a formatted metadata string from the Meta object.

    :param meta: :class:`plumd.Meta` object that describes a metrics metadata.
    :type meta: plumd.Meta
    :param sep: seperator character for metadata values (eg. =).
    :type sep: str
    :rtype: str
    """
    # generate metadata string
    mmeta_dat = []
    for mkey, mval in meta.items:
        # eg. nic, metric(name='nic', value='eth0')
        mkey = plumd.util.replace_chars(mkey)
        mval = mval[1]
        if isinstance(mval, str):
            mval = plumd.util.replace_chars(mval)
        elif isinstance(mval, bool):
            mval = "true" if mval else "false"
        mmeta_dat.append("{0}{1}{2}".format(mkey, sep, mval))
    return ".".join(mmeta_dat)


def get_metric_str(prefix, hmeta_str, mmeta_str, metric, rname):
    """Return a string representation of a metric.

    :param prefix: the metric prefix to use (eg. servers)
    :type prefix: str
    :param hmeta_str: the host metadata string.
    :type hmeta_str: str
    :param mmeta_str: the metric metadata string.
    :type mmeta_str: str
    :param metric: the metric.
    :type metric: plumd.Integer or plumd.Float or plumd.String
    :param rname: the result set name (eg. cpu).
    :type rname: str
    :rtype: str
    """
    args = []
    # both host and metric metadata exists
    if hmeta_str:
        args = [ prefix, hmeta_str, rname, metric[0] ]
    else:
        args = [ prefix, rname, metric[0] ]
    if mmeta_str:
        args.append(mmeta_str)
    return ".".join(args)


class GraphiteRenderPlain(plumd.Render):
    """Renders metrics in graphite plain text format:

    <prefix>.<hmeta=hval>.<measurement>.<metric>.<mmeta=mval>.value <value> <ts>

    where host and metric metadata keys are sorted before being added to the
    metric name and the seperator character is configurable. eg.

    servers.env=test.region=test.cpu.idle.value 0.0 1452240380
    servers.env=test.region=test.disk.free.dev=sda1.value 1213234232 1452240380

    or with a . seperator character:

    servers.env.test.region.test.cpu.idle.value 0.0 1452240380
    servers.env.test.region.test.disk.free.dev.sda1.value 1213234232 1452240380

    :param rconfig: A Conf object initialized with the plugin configuration.
    :type rconfig: plumd.conf.Conf
    :raises: plumd.ConfigError
    """
    def __init__(self, rconfig):
        super(GraphiteRenderPlain, self).__init__(rconfig)
        # get the configured values from the plugin configuration
        self.prefix = rconfig.get("prefix")
        # record rendered metrics here, when bytes > max_bytes put into deque
        self.buff = ""
        self.buff_bytes = 0
        self.seperator = rconfig.get("seperator")
        if self.seperator and isinstance(self.seperator, str):
            self.seperator = self.seperator[0]

        # generate the host meta data string - assumes static host metadata
        self.hmeta_str = format_meta(self.meta, self.seperator)


    def process(self, results):
        """Process the metrics in the result set into the graphite plain text
        format.

        :param results: a generator that returns metrics in a standard format
        :type results: generator
        """
        # render each metric in the graphite plaintext format
        for (ts, rname, rmeta, metrics) in results:
            # get the metadata for this metric
            mmeta_str = format_meta(rmeta, self.seperator)

            # generate a metric string for each metric
            for metric in metrics:
                # silently ignore strings
                if metric.__class__ == plumd.String:
                    continue

                # booleans are either really big or 0
                mval = metric[1]
                if metric.__class__ == plumd.Boolean:
                    mval = sys.maxint if mval else 0

                # get the full metric string
                met_str = get_metric_str(self.prefix, self.hmeta_str,
                                         mmeta_str, metric, rname)

                # now combine the values
                fmstr = "{0} {1} {2}\n".format(met_str, mval, int(ts))
                fmstr_len = len(fmstr)

                # can we append to the existing buffer?
                if len(self.buff) + fmstr_len < self.max_bytes:
                    self.buff += fmstr
                    self.buff_bytes += fmstr_len
                    continue

                # or do we need to queue and start a new buffer?
                self.metrics.append(self.buff)
                self.buff = fmstr
                self.buff_bytes = fmstr_len


class GraphiteRenderPickle(plumd.Render):
    """Renders metrics in graphite pickle format:

    [ (<metric>, (<timestamp>, <value>)), ... ]

    where host and metric metadata keys are sorted before being added to the
    metric name and the seperator character is configurable - aside from
    rendering metrics in the pickle format the functionality is the same as the
    GraphiteRenderPlain class.

    :param rconfig: A Conf object initialized with the plugin configuration.
    :type rconfig: plumd.conf.Conf
    :raises: plumd.ConfigError
    """
    def __init__(self, rconfig):
        super(GraphiteRenderPickle, self).__init__(rconfig)
        # get the configured values from the plugin configuration
        self.prefix = rconfig.get("prefix")
        # record metric tuples here, pickle and queue once max_items reached
        self.buff = []
        self.seperator = rconfig.get("seperator")
        if self.seperator and isinstance(self.seperator, str):
            self.seperator = self.seperator[0]

        # generate the host meta data string - assumes static host metadata
        self.hmeta_str = format_meta(self.meta, self.seperator)


    def process(self, results):
        """Process the metrics in the result set into the graphite pickle
        format.

        :param results: a generator that returns metrics in a standard format
        :type results: generator
        """
        # render each metric in the graphite plaintext format
        for (ts, rname, rmeta, metrics) in results:
            # get the metadata for this metric
            mmeta_str = format_meta(rmeta, self.seperator)

            # generate a metric string for each metric
            for metric in metrics:
                # silently ignore strings
                if metric.__class__ == plumd.String:
                    continue

                # booleans are either really big or 0
                mval = metric[1]
                if metric.__class__ == plumd.Boolean:
                    mval = sys.maxint if mval else 0

                # get the full metric string
                met_str = get_metric_str(self.prefix, self.hmeta_str,
                                         mmeta_str, metric, rname)

                # now combine the values
                fmstr = "{0} {1} {2}\n".format(met_str, mval, int(ts))
                pmetric = ( fmstr, (ts.timestamp, mval) )
                if len(self.buff) < self.max_items:
                    self.buff.append(pmetric)
                    continue

                # or do we need to queue and start a new buffer?
                pvals = pickle.dumps(self.buff, protocol=2)
                pmetrics = struct.pack("!L", len(pvals)) + pvals
                self.metrics.append(pmetrics)
                self.buff = []


class Graphite(plumd.plugins.Writer):
    """Graphite sender."""
    ## todo: move things to render, writers, remove from here
    ## also todo: print warning for queue size in render not in Graphite
    defaults = {
        'prefix':           "servers",
        'host':             '127.0.0.1',
        'port':             2003,
        'protocol':         "tcp",
        'format':           "plain", # plain or pickle
        'seperator':        "=",     # metadata seperator
        'batch':            64,      # send batches of this size
        'retry':            30,      # delay between connection attempts
        'retries':          3,       # retry sends this many times
        'timeout':          5,       # new connection timeout
        'maxqueue':         8192,    # maximum number of metrics to queue
        'warnqueue':        1024     # print warning if queue size > this
    }

    def __init__(self, log, config):
        """Graphite sender. WIP

        :param log: A logger
        :type log: logging.RootLogger
        :param config: a plumd.config.Conf configuration helper instance.
        :type config: plumd.config.Conf
        """
        super(Graphite, self).__init__(log, config)
        config.defaults(Graphite.defaults)
        self.render = None
        fmt = config.get('format')
        fmts = {
            'plain': GraphiteRenderPlain,
            'pickle': GraphiteRenderPickle
        }
        if fmt in fmts:
            self.render = fmts[fmt](self.config)
        else:
            raise plumd.ConfigError("unkown format: {0}".format(fmt))
        proto = config.get('protocol')
        host = config.get('host')
        port = config.get('port')
        self.writer = None
        writers = {
            'tcp': GraphiteWriteTCP,
            'udp': GraphiteWriteUDP
        }
        if proto in writers:
            self.writer = writers[proto](self.log, config)
        else:
            raise plumd.ConfigError("unkown protocol: {0}".format(proto))


    def onstop(self):
        """Flush remaining metrics and disconnect socket on shutdown."""
        # get the next full batch of metrics to send
        for mbuff in self.render:
            self.writer.write_nonblock(mbuff)

        # flush and close fd, socket
        self.writer.disconnect()


    def push(self, rset):
        """Render metrics onto our deque and send all full batches.

        :param metrics: The list of pre-formated metrics from our renderer.
        :type metrics: list
        """
        # record this batch of metrics
        if rset:
            self.render.process(rset.results)

        # get the next full batch of metrics to send - next_batch pop_left's
        for mbuff in self.render:
            self.writer.write(mbuff)


class GraphiteWriteTCP(object):
    """Graphite TCP writer."""

    def __init__(self, log, config):
        """Graphite TCP writer."""
        self.log = log
        self.retries = config.get('retries')
        self.timeout = config.get('timeout')
        self.retry = config.get('retry')
        self.addr = (config.get('host'), config.get('port'))
        self.socket = None
        self.fd = None
        self.connected = False


    def disconnect(self):
        """Severe the graphite connection."""
        if self.fd:
            try:
                self.fd.close()
            except Exception as e:
                pass
        if self.socket:
            try:
                self.socket.close()
            except Exception as e:
                pass
        self.connected = False


    def connect(self):
        """Connect to graphite and maintain a connection. Returns True if
        the connection was made or False if it failed.

        :param blocking: Wether to keep trying on failures or not.
        :type blocking: bool
        :rtype: bool
        """
        self.disconnect()
        # attempt to connect up to max number of attempts
        maxtries = self.retries
        while maxtries > 0:
            try:
                self.socket = socket.create_connection(self.addr, self.timeout)
                self.fd = self.socket.makefile("r+b", bufsize=0)
                self.connected = True
                msg = "graphite: connected: {0}"
                self.log.info(msg.format(self.addr))
                break
            except Exception as e:
                msg = "graphite: {0}: connect: excception: {1}"
                self.log.error(msg.format(self.addr, e))
                self.disconnect()
                time.sleep(self.retry)
            maxtries -= 1
        return self.connected


    def write_nonblock(self, metrics):
        """Send the metrics string to graphite.

        todo: add support for pickle format, currently assumes plain text

        :param metrics: the metrics string to send.
        :type metrics: str
        """
        retries = self.retries
        while ( not self.connected ) and ( retries > 1 ):
            self.connect()
            self.retries -= 1

        if not self.connected:
            self.log.error("graphite: max connect retries: dropping metrics")
            return

        sent = False
        while not sent:
            try:
                self.fd.write(metrics)
                self.fd.flush()
                sent = True
            except Exception as e:
                msg = "graphite: {0}: write: dropping metrics: exception: {1}"
                self.log.error(msg.format(self.addr, e))
                # reconnect


    def write(self, metrics):
        """Send the metrics string to graphite.

        todo: add support for pickle format, currently assumes plain text

        :param metrics: the metrics string to send.
        :type metrics: str
        """
        while not self.connected:
            self.connect()

        sent = False
        while not sent:
            try:
                self.fd.write(metrics)
                self.fd.flush()
                sent = True
            except Exception as e:
                msg = "graphite: {0}: write: exception: {1}"
                self.log.error(msg.format(self.addr, e))
                # reconnect
                self.connect()
                time.sleep(self.retry)


class GraphiteWriteUDP(object):
    """Graphite UDP writer."""

    def __init__(self, log, config):
        """Graphite UDP writer."""
        self.log = log
        self.addr = (config.get('host'), config.get('port'))
        self.socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)


    def write_blocking(self, metrics):
        """Send the metrics to graphite and return number of bytes sent.

        :param metrics: the metrics string to send.
        :type metrics: str
        :rtype: int
        """
        return self.socket.sendto(metrics, self.addr)


    def write(self, metrics):
        """Send the metrics to graphite and return number of bytes sent.

        :param metrics: the metrics string to send.
        :type metrics: str
        :rtype: int
        """
        return self.socket.sendto(metrics, self.addr)


1			# -- coding: utf-8 --
2
3			__author__ = 'Kenny Freeman'
4			__email__ = '[email protected]'
5			__license__ = "ISCL"
6			__docformat__ = 'reStructuredText'
7
8			import sys
9			import time
10			import struct
11			import socket
12
13			import plumd
14			import plumd.util
15			import plumd.plugins
16
17
18			def format_meta(meta, sep):
19			"""Return a formatted metadata string from the Meta object.
20
21			:param meta: :class:`plumd.Meta` object that describes a metrics metadata.
22			:type meta: plumd.Meta
23			:param sep: seperator character for metadata values (eg. =).
24			:type sep: str
25			:rtype: str
26			"""
27			# generate metadata string
28			mmeta_dat = []
29			for mkey, mval in meta.items:
30			# eg. nic, metric(name='nic', value='eth0')
31			mkey = plumd.util.replace_chars(mkey)
32			mval = mval[1]
33			if isinstance(mval, str):
34			mval = plumd.util.replace_chars(mval)
35			elif isinstance(mval, bool):
36			mval = "true" if mval else "false"
37			mmeta_dat.append("{0}{1}{2}".format(mkey, sep, mval))
38			return ".".join(mmeta_dat)
39
40
41			def get_metric_str(prefix, hmeta_str, mmeta_str, metric, rname):
42			"""Return a string representation of a metric.
43
44			:param prefix: the metric prefix to use (eg. servers)
45			:type prefix: str
46			:param hmeta_str: the host metadata string.
47			:type hmeta_str: str
48			:param mmeta_str: the metric metadata string.
49			:type mmeta_str: str
50			:param metric: the metric.
51			:type metric: plumd.Integer or plumd.Float or plumd.String
52			:param rname: the result set name (eg. cpu).
53			:type rname: str
54			:rtype: str
55			"""
56			args = []
57			# both host and metric metadata exists
58			if hmeta_str:
59			args = [ prefix, hmeta_str, rname, metric[0] ]
60			else:
61			args = [ prefix, rname, metric[0] ]
62			if mmeta_str:
63			args.append(mmeta_str)
64			return ".".join(args)
65
66
67			class GraphiteRenderPlain(plumd.Render):
68			"""Renders metrics in graphite plain text format:
69
70			<prefix>.<hmeta=hval>.<measurement>.<metric>.<mmeta=mval>.value <value> <ts>
71
72			where host and metric metadata keys are sorted before being added to the
73			metric name and the seperator character is configurable. eg.
74
75			servers.env=test.region=test.cpu.idle.value 0.0 1452240380
76			servers.env=test.region=test.disk.free.dev=sda1.value 1213234232 1452240380
77
78			or with a . seperator character:
79
80			servers.env.test.region.test.cpu.idle.value 0.0 1452240380
81			servers.env.test.region.test.disk.free.dev.sda1.value 1213234232 1452240380
82
83			:param rconfig: A Conf object initialized with the plugin configuration.
84			:type rconfig: plumd.conf.Conf
85			:raises: plumd.ConfigError
86			"""
87			def __init__(self, rconfig):
88			super(GraphiteRenderPlain, self).__init__(rconfig)
89			# get the configured values from the plugin configuration
90			self.prefix = rconfig.get("prefix")
91			# record rendered metrics here, when bytes > max_bytes put into deque
92			self.buff = ""
93			self.buff_bytes = 0
94			self.seperator = rconfig.get("seperator")
95			if self.seperator and isinstance(self.seperator, str):
96			self.seperator = self.seperator[0]
97
98			# generate the host meta data string - assumes static host metadata
99			self.hmeta_str = format_meta(self.meta, self.seperator)
100
101
102			def process(self, results):
103			"""Process the metrics in the result set into the graphite plain text
104			format.
105
106			:param results: a generator that returns metrics in a standard format
107			:type results: generator
108			"""
109			# render each metric in the graphite plaintext format
110			for (ts, rname, rmeta, metrics) in results:
111			# get the metadata for this metric
112			mmeta_str = format_meta(rmeta, self.seperator)
113
114			# generate a metric string for each metric
115			for metric in metrics:
116			# silently ignore strings
117			if metric.__class__ == plumd.String:
118			continue
119
120			# booleans are either really big or 0
121			mval = metric[1]
122			if metric.__class__ == plumd.Boolean:
123			mval = sys.maxint if mval else 0
124
125			# get the full metric string
126			met_str = get_metric_str(self.prefix, self.hmeta_str,
127			mmeta_str, metric, rname)
128
129			# now combine the values
130			fmstr = "{0} {1} {2}\n".format(met_str, mval, int(ts))
131			fmstr_len = len(fmstr)
132
133			# can we append to the existing buffer?
134			if len(self.buff) + fmstr_len < self.max_bytes:
135			self.buff += fmstr
136			self.buff_bytes += fmstr_len
137			continue
138
139			# or do we need to queue and start a new buffer?
140			self.metrics.append(self.buff)
141			self.buff = fmstr
142			self.buff_bytes = fmstr_len
143
144
145			class GraphiteRenderPickle(plumd.Render):
146			"""Renders metrics in graphite pickle format:
147
148			[ (<metric>, (<timestamp>, <value>)), ... ]
149
150			where host and metric metadata keys are sorted before being added to the
151			metric name and the seperator character is configurable - aside from
152			rendering metrics in the pickle format the functionality is the same as the
153			GraphiteRenderPlain class.
154
155			:param rconfig: A Conf object initialized with the plugin configuration.
156			:type rconfig: plumd.conf.Conf
157			:raises: plumd.ConfigError
158			"""
159			def __init__(self, rconfig):
160			super(GraphiteRenderPickle, self).__init__(rconfig)
161			# get the configured values from the plugin configuration
162			self.prefix = rconfig.get("prefix")
163			# record metric tuples here, pickle and queue once max_items reached
164			self.buff = []
165			self.seperator = rconfig.get("seperator")
166			if self.seperator and isinstance(self.seperator, str):
167			self.seperator = self.seperator[0]
168
169			# generate the host meta data string - assumes static host metadata
170			self.hmeta_str = format_meta(self.meta, self.seperator)
171
172
173			def process(self, results):
174			"""Process the metrics in the result set into the graphite pickle
175			format.
176
177			:param results: a generator that returns metrics in a standard format
178			:type results: generator
179			"""
180			# render each metric in the graphite plaintext format
181			for (ts, rname, rmeta, metrics) in results:
182			# get the metadata for this metric
183			mmeta_str = format_meta(rmeta, self.seperator)
184
185			# generate a metric string for each metric
186			for metric in metrics:
187			# silently ignore strings
188			if metric.__class__ == plumd.String:
189			continue
190
191			# booleans are either really big or 0
192			mval = metric[1]
193			if metric.__class__ == plumd.Boolean:
194			mval = sys.maxint if mval else 0
195
196			# get the full metric string
197			met_str = get_metric_str(self.prefix, self.hmeta_str,
198			mmeta_str, metric, rname)
199
200			# now combine the values
201			fmstr = "{0} {1} {2}\n".format(met_str, mval, int(ts))
202			pmetric = ( fmstr, (ts.timestamp, mval) )
203			if len(self.buff) < self.max_items:
204			self.buff.append(pmetric)
205			continue
206
207			# or do we need to queue and start a new buffer?
208			pvals = pickle.dumps(self.buff, protocol=2)
209			pmetrics = struct.pack("!L", len(pvals)) + pvals
210			self.metrics.append(pmetrics)
211			self.buff = []
212
213
214			class Graphite(plumd.plugins.Writer):
215			"""Graphite sender."""
216			## todo: move things to render, writers, remove from here
217			## also todo: print warning for queue size in render not in Graphite
218			defaults = {
219			'prefix': "servers",
220			'host': '127.0.0.1',
221			'port': 2003,
222			'protocol': "tcp",
223			'format': "plain", # plain or pickle
224			'seperator': "=", # metadata seperator
225			'batch': 64, # send batches of this size
226			'retry': 30, # delay between connection attempts
227			'retries': 3, # retry sends this many times
228			'timeout': 5, # new connection timeout
229			'maxqueue': 8192, # maximum number of metrics to queue
230			'warnqueue': 1024 # print warning if queue size > this
231			}
232
233			def __init__(self, log, config):
234			"""Graphite sender. WIP
235
236			:param log: A logger
237			:type log: logging.RootLogger
238			:param config: a plumd.config.Conf configuration helper instance.
239			:type config: plumd.config.Conf
240			"""
241			super(Graphite, self).__init__(log, config)
242			config.defaults(Graphite.defaults)
243			self.render = None
244			fmt = config.get('format')
245			fmts = {
246			'plain': GraphiteRenderPlain,
247			'pickle': GraphiteRenderPickle
248			}
249			if fmt in fmts:
250			self.render = fmts[fmt](self.config)
251			else:
252			raise plumd.ConfigError("unkown format: {0}".format(fmt))
253			proto = config.get('protocol')
254			host = config.get('host')
255			port = config.get('port')
256			self.writer = None
257			writers = {
258			'tcp': GraphiteWriteTCP,
259			'udp': GraphiteWriteUDP
260			}
261			if proto in writers:
262			self.writer = writers[proto](self.log, config)
263			else:
264			raise plumd.ConfigError("unkown protocol: {0}".format(proto))
265
266
267			def onstop(self):
268			"""Flush remaining metrics and disconnect socket on shutdown."""
269			# get the next full batch of metrics to send
270			for mbuff in self.render:
271			self.writer.write_nonblock(mbuff)
272
273			# flush and close fd, socket
274			self.writer.disconnect()
275
276
277			def push(self, rset):
278			"""Render metrics onto our deque and send all full batches.
279
280			:param metrics: The list of pre-formated metrics from our renderer.
281			:type metrics: list
282			"""
283			# record this batch of metrics
284			if rset:
285			self.render.process(rset.results)
286
287			# get the next full batch of metrics to send - next_batch pop_left's
288			for mbuff in self.render:
289			self.writer.write(mbuff)
290
291
292			class GraphiteWriteTCP(object):
293			"""Graphite TCP writer."""
294
295			def __init__(self, log, config):
296			"""Graphite TCP writer."""
297			self.log = log
298			self.retries = config.get('retries')
299			self.timeout = config.get('timeout')
300			self.retry = config.get('retry')
301			self.addr = (config.get('host'), config.get('port'))
302			self.socket = None
303			self.fd = None
304			self.connected = False
305
306
307			def disconnect(self):
308			"""Severe the graphite connection."""
309			if self.fd:
310			try:
311			self.fd.close()
312			except Exception as e:
313			pass
314			if self.socket:
315			try:
316			self.socket.close()
317			except Exception as e:
318			pass
319			self.connected = False
320
321
322			def connect(self):
323			"""Connect to graphite and maintain a connection. Returns True if
324			the connection was made or False if it failed.
325
326			:param blocking: Wether to keep trying on failures or not.
327			:type blocking: bool
328			:rtype: bool
329			"""
330			self.disconnect()
331			# attempt to connect up to max number of attempts
332			maxtries = self.retries
333			while maxtries > 0:
334			try:
335			self.socket = socket.create_connection(self.addr, self.timeout)
336			self.fd = self.socket.makefile("r+b", bufsize=0)
337			self.connected = True
338			msg = "graphite: connected: {0}"
339			self.log.info(msg.format(self.addr))
340			break
341			except Exception as e:
342			msg = "graphite: {0}: connect: excception: {1}"
343			self.log.error(msg.format(self.addr, e))
344			self.disconnect()
345			time.sleep(self.retry)
346			maxtries -= 1
347			return self.connected
348
349
350			def write_nonblock(self, metrics):
351			"""Send the metrics string to graphite.
352
353			todo: add support for pickle format, currently assumes plain text
354
355			:param metrics: the metrics string to send.
356			:type metrics: str
357			"""
358			retries = self.retries
359			while ( not self.connected ) and ( retries > 1 ):
360			self.connect()
361			self.retries -= 1
362
363			if not self.connected:
364			self.log.error("graphite: max connect retries: dropping metrics")
365			return
366
367			sent = False
368			while not sent:
369			try:
370			self.fd.write(metrics)
371			self.fd.flush()
372			sent = True
373			except Exception as e:
374			msg = "graphite: {0}: write: dropping metrics: exception: {1}"
375			self.log.error(msg.format(self.addr, e))
376			# reconnect
377
378
379			def write(self, metrics):
380			"""Send the metrics string to graphite.
381
382			todo: add support for pickle format, currently assumes plain text
383
384			:param metrics: the metrics string to send.
385			:type metrics: str
386			"""
387			while not self.connected:
388			self.connect()
389
390			sent = False
391			while not sent:
392			try:
393			self.fd.write(metrics)
394			self.fd.flush()
395			sent = True
396			except Exception as e:
397			msg = "graphite: {0}: write: exception: {1}"
398			self.log.error(msg.format(self.addr, e))
399			# reconnect
400			self.connect()
401			time.sleep(self.retry)
402
403
404			class GraphiteWriteUDP(object):
405			"""Graphite UDP writer."""
406
407			def __init__(self, log, config):
408			"""Graphite UDP writer."""
409			self.log = log
410			self.addr = (config.get('host'), config.get('port'))
411			self.socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
412
413
414			def write_blocking(self, metrics):
415			"""Send the metrics to graphite and return number of bytes sent.
416
417			:param metrics: the metrics string to send.
418			:type metrics: str
419			:rtype: int
420			"""
421			return self.socket.sendto(metrics, self.addr)
422
423
424			def write(self, metrics):
425			"""Send the metrics to graphite and return number of bytes sent.
426
427			:param metrics: the metrics string to send.
428			:type metrics: str
429			:rtype: int
430			"""
431			return self.socket.sendto(metrics, self.addr)
432

s4z / plumd

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GraphiteRenderPlain.process() C

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