Exemplo n.º 1
0
class CachedSQLTable(SQLTable):
    
    def __init__(self):

        super(CachedSQLTable, self).__init__()

        self._cache = None
        self.cache_hits = 0
        self.cache_misses = 0
        
        # TODO: Note: this caches only when there are results (for OLAP classes). At least this shall be optional.
        
    def initialize(self, ctx):
        
        super(CachedSQLTable, self).initialize(ctx)
        self._cache = Cache().cache() 
        
    def finalize(self, ctx):
        
        if (self.cache_hits + self.cache_misses > 0):
            logger.info ("%s  hits/misses: %d/%d (%.2f%%)" % (self, self.cache_hits, self.cache_misses, float(self.cache_hits) / (self.cache_hits + self.cache_misses) * 100))
        
        super(CachedSQLTable, self).finalize(ctx)
        
    def _find(self, ctx, attribs):

        rows = None
        cache_key = tuple(sorted(attribs.items()))
        
        # Check if using primary key
        if (len(attribs.keys()) >0):
                rows = self._cache.get(cache_key)
                if (rows != None) and (ctx.debug2):  
                    logger.debug("Returning row from cache for search attibs: %s" % (attribs))

        # TODO: Cache also on natural keys
                
        # Run through parent
        if (rows == None):
            
            self.cache_misses = self.cache_misses + 1
            
            #query = self.sa_table.select(self._attribsToClause(attribs))
            #rows = self.connection.engine().execute(query)
            
            rowsb = super(CachedSQLTable, self)._find(ctx, attribs)

            rows = []             
            for row in rowsb:
                rows.append(row) 
        
            # Cache if appropriate
            if (len(attribs.keys()) > 0):
                if (len(rows) > 0):
                    if (ctx.debug2): logger.debug("Caching row: %s = %s" % (attribs, rows))
                    self._cache.put(cache_key, rows)
        else:
            self.cache_hits = self.cache_hits + 1
        
        return iter(rows)
Exemplo n.º 2
0
class CachedTableLookup(TableLookup):

    NOT_CACHED = "NOT_CACHED"

    def __init__(self, table, lookup, default=None):
        super().__init__(table=table, lookup=lookup, default=default)

        self.cache_hits = 0
        self.cache_misses = 0

        self._cache = None

    def initialize(self, ctx):

        super(CachedTableLookup, self).initialize(ctx)
        self._cache = Cache().cache()

    def finalize(self, ctx):

        logger.info(
            "%s  hits/misses: %d/%d (%.2f%%)" %
            (self, self.cache_hits, self.cache_misses, float(self.cache_hits) /
             (self.cache_hits + self.cache_misses) * 100))

        super(CachedTableLookup, self).finalize(ctx)

    def process(self, ctx, m):

        keys = self._resolve_lookup_keys(ctx, m)
        cache_key = tuple(sorted(keys.items()))

        result = self._cache.get(cache_key, CachedTableLookup.NOT_CACHED)
        if result != CachedTableLookup.NOT_CACHED:
            self.cache_hits = self.cache_hits + 1
        else:
            self.cache_misses = self.cache_misses + 1
            result = self._do_lookup(ctx, m, keys)
            self._cache.put(cache_key, result)

        if result:
            Eval.process_evals(ctx, m, self.mappings, result)
        else:
            print(self.table._rows)
            raise Exception("No rows found when looking up in %s: %s" %
                            (self, keys))
            m.update(
                {k: ctx.interpolate(v, m)
                 for k, v in self.default.items()})

        if (ctx.debug2):
            logger.debug("Cache table lookup (lookup=%s): %s" % (keys, result))

        yield m
Exemplo n.º 3
0
class CachedTableLookup(TableLookup):

    NOT_CACHED = "NOT_CACHED"

    def __init__(self, table, lookup, default=None):
        super().__init__(table=table, lookup=lookup, default=default)

        self.cache_hits = 0
        self.cache_misses = 0

        self._cache = None

    def initialize(self, ctx):

        super(CachedTableLookup, self).initialize(ctx)
        self._cache = Cache().cache()

    def finalize(self, ctx):

        logger.info("%s  hits/misses: %d/%d (%.2f%%)" % (self, self.cache_hits, self.cache_misses, float(self.cache_hits) / (self.cache_hits + self.cache_misses) * 100))

        super(CachedTableLookup, self).finalize(ctx)

    def process(self, ctx, m):

        keys = self._resolve_lookup_keys(ctx, m)
        cache_key = tuple(sorted(keys.items()))

        result = self._cache.get(cache_key, CachedTableLookup.NOT_CACHED)
        if result != CachedTableLookup.NOT_CACHED:
            self.cache_hits = self.cache_hits + 1
        else:
            self.cache_misses = self.cache_misses + 1
            result = self._do_lookup(ctx, m, keys)
            self._cache.put(cache_key, result)

        if result:
            Eval.process_evals(ctx, m, self.mappings, result)
        else:
            print(self.table._rows)
            raise Exception("No rows found when looking up in %s: %s" % (self, keys))
            m.update({ k: ctx.interpolate(v, m) for k, v in self.default.items() })

        if (ctx.debug2):
            logger.debug("Cache table lookup (lookup=%s): %s" % (keys, result))

        yield m
Exemplo n.º 4
0
class CachedTableLookup(TableLookup):

    NOT_CACHED = "NOT_CACHED"

    _cache = None
    cache_hits = 0
    cache_misses = 0

    def initialize(self, ctx):

        super(CachedTableLookup, self).initialize(ctx)
        self._cache = Cache().cache()

    def finalize(self, ctx):

        logger.info(
            "%s  hits/misses: %d/%d (%.2f%%)" %
            (self, self.cache_hits, self.cache_misses, float(self.cache_hits) /
             (self.cache_hits + self.cache_misses) * 100))

        super(CachedTableLookup, self).finalize(ctx)

    def process(self, ctx, m):

        keys = self._resolve_lookup_keys(ctx, m)
        cache_key = tuple(sorted(keys.items()))

        result = self._cache.get(cache_key, CachedTableLookup.NOT_CACHED)
        if (result != CachedTableLookup.NOT_CACHED):
            self.cache_hits = self.cache_hits + 1
            if (ctx.debug2):
                logger.debug("Query cache hit: %s" % (result))
        else:
            self.cache_misses = self.cache_misses + 1
            result = self._do_lookup(ctx, m, keys)
            self._cache.put(cache_key, result)

        if (result):
            Eval.process_evals(ctx, m, self.mappings, result)
        else:
            m.update(
                {k: ctx.interpolate(m, v)
                 for k, v in self.default.items()})

        yield m
Exemplo n.º 5
0
class CachedTableLookup(TableLookup):

    NOT_CACHED = "NOT_CACHED"

    def __init__(self):

        super(CachedTableLookup, self).__init__()

        self._cache = None
        self.cache_hits = 0
        self.cache_misses = 0

    def initialize(self, ctx):

        super(CachedTableLookup, self).initialize(ctx)
        self._cache = Cache().cache()

    def finalize(self, ctx):

        logger.info("%s  hits/misses: %d/%d" % (self, self.cache_hits, self.cache_misses))

        super(CachedTableLookup, self).finalize(ctx)

    def process(self, ctx, m):

        keys = self._resolve_lookup_keys(ctx, m)
        cache_key = tuple(sorted(keys.items()))

        result = self._cache.get(cache_key, CachedTableLookup.NOT_CACHED)
        if result != CachedTableLookup.NOT_CACHED:
            self.cache_hits = self.cache_hits + 1
            if ctx.debug2:
                logger.debug("Query cache hit: %s" % (result))
        else:
            self.cache_misses = self.cache_misses + 1
            result = self._do_lookup(ctx, m, keys)
            self._cache.put(cache_key, result)

        if result:
            Eval.process_evals(ctx, m, self.mappings, result)
        else:
            m.update({k: ctx.interpolate(m, v) for k, v in self.default.items()})

        yield m
Exemplo n.º 6
0
class CachedQueryLookup(QueryLookup):
    
    NOT_CACHED = "NOT_CACHED"
    
    def __init__(self):

        super(CachedQueryLookup, self).__init__()

        self.connection = None
        self.query = None

        self._cache = None
        self.cache_hits = 0
        self.cache_misses = 0
        
    def initialize(self, ctx):
        
        super(CachedQueryLookup, self).initialize(ctx)
        self._cache = Cache().cache() 
        
    def finalize(self, ctx):
        
        if (self.cache_hits + self.cache_misses > 0):
            logger.info ("%s  hits/misses: %d/%d (%.2f%%)" % (self, self.cache_hits, self.cache_misses, float(self.cache_hits) / (self.cache_hits + self.cache_misses) * 100))
        
        super(CachedQueryLookup, self).finalize(ctx)
        
    def process(self, ctx, m):

        query = ctx.interpolate(m, self.query)
        
        result = self._cache.get(query, CachedQueryLookup.NOT_CACHED)
        if (result != CachedQueryLookup.NOT_CACHED):
            self.cache_hits = self.cache_hits + 1
            if (ctx.debug2): logger.debug("Query cache hit: %s" % (result))
        else:
            self.cache_misses = self.cache_misses + 1
            result = self._do_query(query)
            self._cache.put(query, result)

        if (result != None): m.update(result)

        yield m
Exemplo n.º 7
0
class CachedQueryLookup(QueryLookup):

    NOT_CACHED = "NOT_CACHED"

    connection = None
    query = None

    _cache = None
    cache_hits = 0
    cache_misses = 0

    def initialize(self, ctx):

        super(CachedQueryLookup, self).initialize(ctx)
        self._cache = Cache().cache()

    def finalize(self, ctx):

        if (self.cache_hits + self.cache_misses > 0):
            logger.info("%s  hits/misses: %d/%d (%.2f%%)" %
                        (self, self.cache_hits, self.cache_misses,
                         float(self.cache_hits) /
                         (self.cache_hits + self.cache_misses) * 100))

        super(CachedQueryLookup, self).finalize(ctx)

    def process(self, ctx, m):

        query = ctx.interpolate(m, self.query)

        result = self._cache.get(query, CachedQueryLookup.NOT_CACHED)
        if (result != CachedQueryLookup.NOT_CACHED):
            self.cache_hits = self.cache_hits + 1
            if (ctx.debug2): logger.debug("Query cache hit: %s" % (result))
        else:
            self.cache_misses = self.cache_misses + 1
            result = self._do_query(query)
            self._cache.put(query, result)

        if (result != None): m.update(result)

        yield m
Exemplo n.º 8
0
class CachedSQLTable(SQLTable):

    _cache = None
    cache_hits = 0
    cache_misses = 0

    # TODO: Note: this caches only when there are results (for OLAP classes). At least this shall be optional.

    def initialize(self, ctx):

        super(CachedSQLTable, self).initialize(ctx)
        self._cache = Cache().cache()

    def finalize(self, ctx):

        if (self.cache_hits + self.cache_misses > 0):
            logger.info("%s  hits/misses: %d/%d (%.2f%%)" %
                        (self, self.cache_hits, self.cache_misses,
                         float(self.cache_hits) /
                         (self.cache_hits + self.cache_misses) * 100))

        super(CachedSQLTable, self).finalize(ctx)

    def _find(self, ctx, attribs):

        rows = None
        cache_key = tuple(sorted(attribs.items()))

        # Check if using primary key
        if (len(attribs.keys()) > 0):
            rows = self._cache.get(cache_key)
            if (rows != None) and (ctx.debug2):
                logger.debug("Returning row from cache for search attibs: %s" %
                             (attribs))

        # TODO: Cache also on natural keys

        # Run through parent
        if (rows == None):

            self.cache_misses = self.cache_misses + 1

            #query = self.sa_table.select(self._attribsToClause(attribs))
            #rows = self.connection.engine().execute(query)

            rowsb = super(CachedSQLTable, self)._find(ctx, attribs)

            rows = []
            for row in rowsb:
                rows.append(row)

            # Cache if appropriate
            if (len(attribs.keys()) > 0):
                if (len(rows) > 0):
                    if (ctx.debug2):
                        logger.debug("Caching row: %s = %s" % (attribs, rows))
                    self._cache.put(cache_key, rows)
        else:
            self.cache_hits = self.cache_hits + 1

        return iter(rows)
Exemplo n.º 9
0
class CachedSQLTable(Component):

    # TODO: Note: this caches only when there are results (for OLAP classes). At least this shall be optional.

    # TODO: This class should compose (proxy) a SQLTable, instead of extending it (?)

    def __init__(self, sqltable):

        super().__init__()

        self._sqltable = sqltable

        self._cache = None
        self.cache_hits = 0
        self.cache_misses = 0

    def initialize(self, ctx):

        #super(CachedSQLTable, self).initialize(ctx)
        ctx.comp.initialize(self._sqltable)
        self._cache = Cache().cache()

    def finalize(self, ctx):

        if (self.cache_hits + self.cache_misses > 0):
            logger.info ("%s  hits/misses: %d/%d (%.2f%%)" % (self, self.cache_hits, self.cache_misses, float(self.cache_hits) / (self.cache_hits + self.cache_misses) * 100))

        ctx.comp.finalize(self._sqltable)
        #super(CachedSQLTable, self).finalize(ctx)

    def _find(self, ctx, attribs):

        rows = None
        cache_key = tuple(sorted(attribs.items()))

        # Check if using primary key
        if (len(attribs.keys()) > 0):
                rows = self._cache.get(cache_key)
                if (rows is not None) and (ctx.debug2):
                    logger.debug("Returning row from cache for search attribs: %s" % (attribs))

        # TODO: Cache also on natural keys

        # Run through parent
        if rows is None:

            self.cache_misses = self.cache_misses + 1

            #query = self.sa_table.select(self._attribsToClause(attribs))
            #rows = self.connection.engine().execute(query)

            rowsb = self._sqltable._find(ctx, attribs)

            rows = []
            for row in rowsb:
                rows.append(row)

            # Cache if appropriate
            if (len(attribs.keys()) > 0):
                if (len(rows) > 0):
                    if (ctx.debug2):
                        logger.debug("Caching row: %s = %s" % (attribs, rows))
                    self._cache.put(cache_key, rows)
        else:
            self.cache_hits = self.cache_hits + 1

        return iter(rows)

    def lookup(self, ctx, attribs):
        return self._sqltable.lookup(ctx, attribs, find_function=self._find)

    def insert(self, ctx, data):
        return self._sqltable.insert(ctx, data)