public static AccessDistribution loadAccessDistribution(
Properties props, long minid, long maxid, DistributionType kind) throws LinkBenchConfigError {
Logger logger = Logger.getLogger(ConfigUtil.LINKBENCH_LOGGER);
String keyPrefix;
switch (kind) {
case LINK_READS:
keyPrefix = LinkBenchConstants.READ_CONFIG_PREFIX;
break;
case LINK_READS_UNCORR:
keyPrefix = LinkBenchConstants.READ_UNCORR_CONFIG_PREFIX;
break;
case LINK_WRITES:
keyPrefix = LinkBenchConstants.WRITE_CONFIG_PREFIX;
break;
case LINK_WRITES_UNCORR:
keyPrefix = LinkBenchConstants.WRITE_UNCORR_CONFIG_PREFIX;
break;
case NODE_READS:
keyPrefix = LinkBenchConstants.NODE_READ_CONFIG_PREFIX;
break;
case NODE_UPDATES:
keyPrefix = LinkBenchConstants.NODE_UPDATE_CONFIG_PREFIX;
break;
case NODE_DELETES:
keyPrefix = LinkBenchConstants.NODE_DELETE_CONFIG_PREFIX;
break;
default:
throw new RuntimeException("Bad kind " + kind);
}
String func_key = keyPrefix + LinkBenchConstants.ACCESS_FUNCTION_SUFFIX;
String access_func = ConfigUtil.getPropertyRequired(props, func_key);
try {
AccessDistMode mode = AccessDistMode.valueOf(access_func.toUpperCase());
if (mode == AccessDistMode.REAL) {
RealDistribution realDist = new RealDistribution();
realDist.init(props, minid, maxid, kind);
InvertibleShuffler shuffler = RealDistribution.getShuffler(kind, maxid - minid);
logger.debug("Using real access distribution" + " for " + kind.toString().toLowerCase());
return new ProbAccessDistribution(realDist, shuffler);
} else {
String config_key = keyPrefix + LinkBenchConstants.ACCESS_CONFIG_SUFFIX;
long config_val = ConfigUtil.getLong(props, config_key);
logger.debug(
"Using built-in access distribution "
+ mode
+ " with config param "
+ config_val
+ " for "
+ kind.toString().toLowerCase());
return new BuiltinAccessDistribution(mode, minid, maxid, config_val);
}
} catch (IllegalArgumentException e) {
return tryDynamicLoad(access_func, props, keyPrefix, minid, maxid, kind);
}
}
/**
* @param className ProbabilityDistribution class name
* @param props
* @param keyPrefix prefix to use for looking up keys in props
* @param minid
* @param maxid
* @return
*/
private static AccessDistribution tryDynamicLoad(
String className,
Properties props,
String keyPrefix,
long minid,
long maxid,
DistributionType kind) {
try {
Logger logger = Logger.getLogger(ConfigUtil.LINKBENCH_LOGGER);
logger.debug(
"Using ProbabilityDistribution class "
+ className
+ " for "
+ kind.toString().toLowerCase());
ProbabilityDistribution pDist =
ClassUtil.newInstance(className, ProbabilityDistribution.class);
pDist.init(minid, maxid, props, keyPrefix);
InvertibleShuffler shuffler = RealDistribution.getShuffler(kind, maxid - minid);
return new ProbAccessDistribution(pDist, shuffler);
} catch (ClassNotFoundException e) {
throw new LinkBenchConfigError(
"Access distribution class " + className + " not successfully loaded: " + e.getMessage());
}
}