commit 96322a7fcb7bce42767e9ef8cbb130d9cd2130ac Author: Karsten Loesing karsten.loesing@gmx.net Date: Tue Jul 24 09:17:20 2012 +0200

Make writing raw weights optional (#5755). --- .../src/CalculatePathSelectionProbabilities.java | 55 ++++++++++++-------- 1 files changed, 33 insertions(+), 22 deletions(-)

diff --git a/task-5755/src/CalculatePathSelectionProbabilities.java b/task-5755/src/CalculatePathSelectionProbabilities.java index de6a889..67bb200 100644 --- a/task-5755/src/CalculatePathSelectionProbabilities.java +++ b/task-5755/src/CalculatePathSelectionProbabilities.java @@ -58,6 +58,9 @@ import org.torproject.descriptor.ServerDescriptor; public class CalculatePathSelectionProbabilities { public static void main(String[] args) throws Exception {

+ /* Note: change to true if raw weights shall be written to disk. */ + boolean writeRawWeights = false; + /* Read advertised bandwidths of all server descriptors in * in/server-descriptors/ to memory. This is a rather brute-force * approach, but it's fine for running this analysis. */ @@ -91,10 +94,13 @@ public class CalculatePathSelectionProbabilities { descriptorReader = DescriptorSourceFactory.createDescriptorReader(); descriptorReader.addDirectory(new File("in/consensuses")); descriptorFiles = descriptorReader.readDescriptors(); - BufferedWriter bw = new BufferedWriter(new FileWriter("weights.csv")); - bw.write("validafter,fingerprint,advertised_bandwidth_fraction," - + "consensus_weight_fraction,guard_probability," - + "middle_probability,exit_probability\n"); + BufferedWriter bw = null; + if (writeRawWeights) { + bw = new BufferedWriter(new FileWriter("weights.csv")); + bw.write("validafter,fingerprint,advertised_bandwidth_fraction," + + "consensus_weight_fraction,guard_probability," + + "middle_probability,exit_probability\n"); + } BufferedWriter bw2 = new BufferedWriter(new FileWriter( "cumulated-weights.csv")); bw2.write("validafter,top_relays,total_exit_probability\n"); @@ -119,16 +125,17 @@ public class CalculatePathSelectionProbabilities { consensus.getValidAfterMillis()); SortedMap<String, Integer> bandwidthWeights = consensus.getBandwidthWeights(); + if (bandwidthWeights == null) { + /* Consensus doesn't contain any bandwidth weights. */ + continue; + } SortedSet<String> weightKeys = new TreeSet<String>(Arrays.asList(( "Wgg,Wgm,Wgd,Wmg,Wmm,Wme,Wmd,Weg,Wem,Wee,Wed,Wgb,Wmb,Web,Wdb," + "Wbg,Wbm,Wbe,Wbd").split(","))); weightKeys.removeAll(bandwidthWeights.keySet()); if (!weightKeys.isEmpty()) { - System.err.print("Consensus is missing bandwidth-weights:"); - for (String weightKey : weightKeys) { - System.err.print(" " + weightKey); - } - System.err.println(); + /* Consensus is missing at least some required bandwidth + * weights. */ continue; } double wgg = ((double) bandwidthWeights.get("Wgg")) / 10000.0, @@ -231,18 +238,20 @@ public class CalculatePathSelectionProbabilities {

/* Write calculated path-selection probabilities to the output * file. */ - for (NetworkStatusEntry relay : - consensus.getStatusEntries().values()) { - String fingerprint = relay.getFingerprint(); - bw.write(String.format("%s,%s,%.9f,%.9f,%.9f,%.9f,%.9f%n", - validAfter, - fingerprint, - advertisedBandwidths.get(fingerprint) - / totalAdvertisedBandwidth, - consensusWeights.get(fingerprint) / totalConsensusWeight, - guardWeights.get(fingerprint) / totalGuardWeight, - middleWeights.get(fingerprint) / totalMiddleWeight, - exitWeights.get(fingerprint) / totalExitWeight)); + if (bw != null) { + for (NetworkStatusEntry relay : + consensus.getStatusEntries().values()) { + String fingerprint = relay.getFingerprint(); + bw.write(String.format("%s,%s,%.9f,%.9f,%.9f,%.9f,%.9f%n", + validAfter, + fingerprint, + advertisedBandwidths.get(fingerprint) + / totalAdvertisedBandwidth, + consensusWeights.get(fingerprint) / totalConsensusWeight, + guardWeights.get(fingerprint) / totalGuardWeight, + middleWeights.get(fingerprint) / totalMiddleWeight, + exitWeights.get(fingerprint) / totalExitWeight)); + } }

/* Write exit probabilities for top-x relays to the second and @@ -274,7 +283,9 @@ public class CalculatePathSelectionProbabilities { } } } - bw.close(); + if (bw != null) { + bw.close(); + } bw2.close(); bw3.close(); }