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Current File : /lib/fm-agent/plugins/tomcat_jmx.py
import logging

import agent_util
import jpype
from jpype import java, javax

logger = logging.getLogger(__name__)


class TomcatJMXPlugin(agent_util.Plugin):
    """Tomcat Plugin for the FortiMonitor Agent using JMX to collect data."""

    textkey = "tomcat_jmx"
    label = "Tomcat (JMX)"

    JMX_MAPPING = {
        # Memory
        "memory.heap": (
            "Heap Memory Usage Used",
            "java.lang",
            "Memory",
            None,
            "HeapMemoryUsage",
            "used",
            "bytes",
        ),
        "memory.heap.committed": (
            "Heap Memory Usage Committed",
            "java.lang",
            "Memory",
            None,
            "HeapMemoryUsage",
            "committed",
            "bytes",
        ),
        "memory.heap.init": (
            "Heap Memory Usage Init",
            "java.lang",
            "Memory",
            None,
            "HeapMemoryUsage",
            "init",
            "bytes",
        ),
        "memory.heap.max": (
            "Heap Memory Usage Max",
            "java.lang",
            "Memory",
            None,
            "HeapMemoryUsage",
            "max",
            "bytes",
        ),
        "memory.non_heap": (
            "Non-Heap Memory Usage Used",
            "java.lang",
            "Memory",
            None,
            "NonHeapMemoryUsage",
            "used",
            "bytes",
        ),
        "memory.non_heap.committed": (
            "Non-Heap Memory Usage Committed",
            "java.lang",
            "Memory",
            None,
            "NonHeapMemoryUsage",
            "committed",
            "bytes",
        ),
        "memory.non_heap.init": (
            "Non-Heap Memory Usage Init",
            "java.lang",
            "Memory",
            None,
            "NonHeapMemoryUsage",
            "init",
            "bytes",
        ),
        "memory.non_heap.max": (
            "Non-Heap Memory Usage Max",
            "java.lang",
            "Memory",
            None,
            "NonHeapMemoryUsage",
            "max",
            "bytes",
        ),
        # Threading
        "threading.count": (
            "Thread Count",
            "java.lang",
            "Threading",
            None,
            "ThreadCount",
            None,
            "count",
        ),
        # OS
        "os.cpu_load.process": (
            "OS Process CPU Load",
            "java.lang",
            "OperatingSystem",
            None,
            "ProcessCpuLoad",
            None,
            "percent",
        ),
        "os.cpu_load.system": (
            "OS System CPU Load",
            "java.lang",
            "OperatingSystem",
            None,
            "SystemCpuLoad",
            None,
            "percent",
        ),
        "os.open_file_descriptors": (
            "OS Open File Descriptor Count",
            "java.lang",
            "OperatingSystem",
            None,
            "OpenFileDescriptorCount",
            None,
            "count",
        ),
        # Class loading
        "class_loading.loaded_classes": (
            "Loaded Class Count",
            "java.lang",
            "ClassLoading",
            None,
            "LoadedClassCount",
            None,
            "count",
        ),
        # MemoryPool
        "memory_pool.eden": (
            "Eden Space",
            "java.lang",
            "MemoryPool",
            "Eden Space",
            "Usage",
            "used",
            "bytes",
        ),
        "memory_pool.eden.ps": (
            "PS Eden Space",
            "java.lang",
            "MemoryPool",
            "PS Eden Space",
            "Usage",
            "used",
            "bytes",
        ),
        "memory_pool.eden.par": (
            "Par Eden Space",
            "java.lang",
            "MemoryPool",
            "Par Eden Space",
            "Usage",
            "used",
            "bytes",
        ),
        "memory_pool.eden.g1": (
            "G1 Eden Space",
            "java.lang",
            "MemoryPool",
            "G1 Eden Space",
            "Usage",
            "used",
            "bytes",
        ),
        "memory_pool.survivor": (
            "Survivor Space",
            "java.lang",
            "MemoryPool",
            "Survivor Space",
            "Usage",
            "used",
            "bytes",
        ),
        "memory_pool.survivor.ps": (
            "PS Survivor Space",
            "java.lang",
            "MemoryPool",
            "PS Survivor Space",
            "Usage",
            "used",
            "bytes",
        ),
        "memory_pool.survivor.par": (
            "Par Survivor Space",
            "java.lang",
            "MemoryPool",
            "Par Survivor Space",
            "Usage",
            "used",
            "bytes",
        ),
        "memory_pool.survivor.g1": (
            "G1 Survivor Space",
            "java.lang",
            "MemoryPool",
            "G1 Survivor Space",
            "Usage",
            "used",
            "bytes",
        ),
        "memory_pool.old.ps": (
            "PS Old Gen",
            "java.lang",
            "MemoryPool",
            "PS Old Gen",
            "Usage",
            "used",
            "bytes",
        ),
        "memory_pool.old.cms": (
            "CMS Old Gen",
            "java.lang",
            "MemoryPool",
            "CMS Old Gen",
            "Usage",
            "used",
            "bytes",
        ),
        "memory_pool.old.g1": (
            "G1 Old Gen",
            "java.lang",
            "MemoryPool",
            "G1 Old Gen",
            "Usage",
            "used",
            "bytes",
        ),
        # Garbage Collector
        "gc.young.copy": (
            "Copy",
            "java.lang",
            "GarbageCollector",
            "Copy",
            "CollectionCount",
            None,
            "count",
        ),
        "gc.young.ps_scavenge": (
            "PS Scavenge",
            "java.lang",
            "MemoryPool",
            "PS Scavenge",
            "CollectionCount",
            None,
            "count",
        ),
        "gc.young.par_new": (
            "ParNew",
            "java.lang",
            "GarbageCollector",
            "ParNew",
            "CollectionCount",
            None,
            "count",
        ),
        "gc.young.g1_generation": (
            "G1 Young Generation",
            "java.lang",
            "GarbageCollector",
            "G1 Young Generation",
            "CollectionCount",
            None,
            "count",
        ),
        "gc.mixed.g1_generation": (
            "G1 Mixed Generation",
            "java.lang",
            "GarbageCollector",
            "G1 Mixed Generation",
            "CollectionCount",
            None,
            "count",
        ),
        "gc.old.mark_sweep_compact": (
            "MarkSweepCompact",
            "java.lang",
            "GarbageCollector",
            "MarkSweepCompact",
            "CollectionCount",
            None,
            "count",
        ),
        "gc.old.ps_mark_sweep": (
            "PS MarkSweep",
            "java.lang",
            "GarbageCollector",
            "PS MarkSweep",
            "CollectionCount",
            None,
            "count",
        ),
        "gc.old.concurrent_mark_sweep": (
            "ConcurrentMarkSweep",
            "java.lang",
            "GarbageCollector",
            "ConcurrentMarkSweep",
            "CollectionCount",
            None,
            "count",
        ),
        "gc.old.g1_generation": (
            "G1 Old Generation",
            "java.lang",
            "GarbageCollector",
            "G1 Old Generation",
            "CollectionCount",
            None,
            "count",
        ),
    }

    @staticmethod
    def __get_object_name_from_tuple(tuple_):
        """returns a constructed ObjectName.

        :type tuple_:  tuple (label, domain, type, bean_name, attribute_name,
        composite_data_key, unit)
        :param tuple_: A tuple with all the information for an ObjectName. A
        string that represents the label, a string that represents the domain,
        and so on and so forth.

        :rtype: javax.management.ObjectName
        :return: An ObjectName object that can be used to lookup a MBean.
        """
        domain, type_, bean_name = tuple_[1], tuple_[2], tuple_[3]
        canonical_name = "%s:" % domain

        if bean_name:
            canonical_name += "name=%s," % bean_name

        if type_:
            canonical_name += "type=%s" % type_

        return javax.management.ObjectName(canonical_name)

    @classmethod
    def get_connections_from_config(cls, config):
        """
        Parse the config object to build a structure of connections parameters
        based on the number of entries that are in each key. The main parameter we base on
        to split off is host.

        :type config: dict (host, port, username, password, jvm_path)
        :param config: Dictionary with the information stored in the config file.

        :rtype: Dict
        :return: Dictionary with connection information split up in multiple if needed.
        """
        keys = ["host", "port", "username", "password", "jvm_path"]
        data = {}
        for key in keys:
            key_value = config.get(key)
            if not key_value and key not in ("username", "password"):
                raise ValueError("Missing %s information from config" % key)
            elif not key_value and key in ("username", "password"):
                # Username and password are not required
                continue
            else:
                values = [value.strip(" ") for value in key_value.split(",")]
                data[key] = values

        connections = {}
        hosts = data["host"]
        for index, host in enumerate(hosts):
            connections[index] = {
                "host": host,
            }
            for key in ["port", "username", "password", "jvm_path"]:
                if len(data.get(key, [])) > 1:
                    # Multiple entries in this config, use the index to apply.
                    value = data[key][index]
                elif len(data.get(key, [])) == 1:
                    value = data[key][0]
                elif key not in ("username", "password"):
                    raise ValueError("Missing %s information from config" % (key))
                else:
                    # Username and password can be skipped
                    continue
                connections[index][key] = value
        return connections

    @classmethod
    def __get_connection(cls, config):
        """
        returns a list of connections from the jpype library - a python interface to
        the Java Native Interface. Wheter there are 1 or many connections depends on the
        number of entries in the host, port and optionally username/password/jvm entries.

        :type config: dict
        :param config: Mapping of information under the application block for
         this plugin.

        :rtype: tuple (status, connection, error_message)
        :return: A tuple containing a numeric value corresponding to the
        agent_util status'. A MBeanServerConnection object. And, a string with
        an error message if any.
        """
        status = agent_util.SUPPORTED
        msg = None

        # Check that we have an agent config
        if not config:
            msg = "No JMX configuration found"
            cls.log.info(msg)
            status = agent_util.MISCONFIGURED

        # Make sure at least host and port are in the config
        if "host" not in config or "port" not in config:
            msg = (
                "Missing value in the [%s] block of the agent config file"
                " (e.g host, port)."
            ) % cls.textkey
            cls.log.info(msg)
            status = agent_util.MISCONFIGURED

        # Try and get the jvm path from the config
        jvm_path = config.get("jvm_path")

        # If we can't find it then try and use the default
        if not jvm_path:
            try:
                jvm_path = jpype.getDefaultJVMPath()
                if not jvm_path:
                    status = agent_util.MISCONFIGURED
                    msg = (
                        "Unable to find JVM, please specify 'jvm_path' in"
                        " the [%s] block of the agent config file."
                    ) % cls.textkey
                    cls.log.info(msg)

            except:
                status = agent_util.MISCONFIGURED
                msg = (
                    "Unable to find JVM, please specify 'jvm_path' in the"
                    " [%s] block of the agent config file."
                ) % cls.textkey
                cls.log.info(msg)

        try:
            # If the JVM has not been started try and start it
            if status is agent_util.SUPPORTED and not jpype.isJVMStarted():
                jpype.startJVM(jvm_path)

        except:
            status = agent_util.MISCONFIGURED
            msg = "Unable to access JMX metrics because JVM cannot be started."
            cls.log.info(msg)

        if status is agent_util.SUPPORTED:
            try:
                # Start the JVM if its not started
                # XXX: Redundant logic - is this necessary?
                if not jpype.isJVMStarted():
                    jpype.startJVM(jvm_path)

                j_hash = java.util.HashMap()

                # If we have a username and password use it as our credentials
                if config.get("username") and config.get("password"):
                    j_array = jpype.JArray(java.lang.String)(
                        [config.get("username"), config.get("password")]
                    )

                    j_hash.put(
                        javax.management.remote.JMXConnector.CREDENTIALS, j_array
                    )

                url = "service:jmx:rmi:///jndi/rmi://%s:%s/jmxrmi" % (
                    config.get("host"),
                    int(config.get("port")),
                )

                jmx_url = javax.management.remote.JMXServiceURL(url)
                jmx_soc = javax.management.remote.JMXConnectorFactory.connect(
                    jmx_url, j_hash
                )

                connection = jmx_soc.getMBeanServerConnection()

                return status, connection, None
            except Exception:
                msg = (
                    "Unable to access JMX metrics, JMX is not running or not installed."
                )
                cls.log.exception(msg)

        return status, None, msg

    @classmethod
    def get_metadata(cls, config):
        """returns a json object who's textkeys correspond to a given metric
        available on the JVM.

        :type config: dict
        :param config: Mapping of information under the application block for
         this plugin.

         :return: JSON Object for all metrics
        """
        result = {}
        configs = cls.get_connections_from_config(config)
        connections = {}
        errors = []
        for entry in configs.values():
            status, connection, msg = cls.__get_connection(entry)
            connection_key = "%s:%s" % (entry["host"], entry["port"])
            if msg:
                errors.append("%s %s" % (connection_key, msg))
            else:
                connections[connection_key] = connection
        if not connections.keys():
            cls.log.info("Unable to connect to any connection")
            for msg in errors:
                cls.log.error(msg)
            return result
        else:
            status = agent_util.SUPPORTED
            msg = ""

        for error in errors:
            cls.log.warning(error)

        for key, tuple_ in cls.JMX_MAPPING.items():
            object_name = cls.__get_object_name_from_tuple(tuple_)

            # Check to see if the object exists, if it doesnt we will throw
            # an error which will be handled silently by continuing through
            # the for loop.
            options = []
            for connection_key, connection in connections.items():
                try:
                    connection.getObjectInstance(object_name)
                    options.append(connection_key)
                except Exception:
                    cls.log.exception(
                        "Tomcat (JMX) plugin - %s bean not found at %s."
                        % (object_name, connection_key)
                    )
                    continue

            if len(connections.keys()) >= 1 and not options:
                # No connection was able to get this value. Set it to unsupported.
                options = None
                status = agent_util.UNSUPPORTED
                msg = "Unreachable %s at any connection" % key
            else:
                # We found options. Is supported.
                msg = ""
                status = agent_util.SUPPORTED

            label, unit = tuple_[0], tuple_[6]
            result[key] = {
                "label": label,
                "options": options,
                "status": status,
                "error_message": msg,
                "unit": unit,
            }
        return result

    @classmethod
    def check(cls, textkey, data, config):
        """returns a value for the metric.

        :type textkey: string
        :param textkey: Canonical name for a metric.

        :type data: string
        :param data: Specific option to check for.

        :type config: dict
        :param config: Mapping of information under the application block for
         this plugin.

        :rtype: double
        :return: Value for a specific metric
        """
        entries = cls.get_connections_from_config(config)
        if data:
            for entry in entries.values():
                possible_match = "%s:%s" % (entry["host"], entry["port"])
                if possible_match == data:
                    config = entry
        else:
            # Default to the first configuration
            config = entries[0]
        status, connection, msg = cls.__get_connection(config)
        if msg:
            cls.log.info("Failed to get a connection: %s" % msg)
            return None

        tuple_ = cls.JMX_MAPPING.get(textkey)

        attribute_name, composite_data_key = tuple_[4], tuple_[5]

        # Create an ObjectName object to lookup
        object_name = cls.__get_object_name_from_tuple(tuple_)

        try:
            object_instance = connection.getObjectInstance(object_name)

            attribute_value = connection.getAttribute(
                object_instance.getObjectName(), attribute_name
            )

            attribute_class_name = attribute_value.__class__.__name__

            # If the object returned is just a numeric value
            if "CompositeDataSupport" not in attribute_class_name:
                return attribute_value.floatValue()

            # If the attribute object does not have the composite data key
            # return none
            if not attribute_value.containsKey(composite_data_key):
                return None

            # If the object returned is of type CompositeDataSupport return the
            # correct value from that object
            check_result = attribute_value.get(composite_data_key)

            return check_result.floatValue()
        except:
            cls.log.info("Tomcat (JMX) plugin - %s bean not found." % object_name)
            return 0

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