keycloak-aplcache

diff --git a/testsuite/performance/README.md b/testsuite/performance/README.md
index b06d483..0fcd6ff 100644
--- a/testsuite/performance/README.md
+++ b/testsuite/performance/README.md
@@ -200,6 +200,11 @@ When running the tests it is necessary to define the dataset to be used.
 | `userThinkTime` | Pause between individual scenario steps. | `5` |
 | `refreshTokenPeriod`| Period after which token should be refreshed. | `10` |
 
+| Test Assertion | Description | Default Value |
+| --- | --- | --- | 
+| `maxFailedRequests`| Maximum number of failed requests. | `0` |
+| `maxMeanReponseTime`| Maximum mean response time of all requests. | `300` |
+
 #### Test Run Parameters specific to `OIDCLoginAndLogoutSimulation`
 
 | Parameter | Description | Default Value |

diff --git a/testsuite/performance/README.stress-test.md b/testsuite/performance/README.stress-test.md
new file mode 100644
index 0000000..978a983
--- /dev/null
+++ b/testsuite/performance/README.stress-test.md
@@ -0,0 +1,68 @@
+# Stress Testing
+
+Stress testing is a type of performance testing focused on *finding the maximum performance* of the system for a specific scenario.
+
+There are various strategies but in general the stress test is a cycle of individual tests runs.
+After each run the performance assertions are evaluated before deciding if/how the loop should continue.
+
+The [test assertions](https://gatling.io/docs/2.3/general/assertions/) are constructed as boolean expressions on top of computed performance metrics, such as mean response time, percentage of failed requests, etc.
+
+
+## Requirements
+
+- `bc` tool for floating-point arithmetic
+
+
+## Usage
+
+`./stress-test.sh [ADDITIONAL_TEST_PARAMS]`
+
+Parameters of the stress test are loaded from `stress-test-config.sh`.
+
+Additional `PROVISIONING_PARAMETERS` can be set via environment variable.
+
+## Common Parameters
+
+| Environment Variable | Description | Default Value |
+| --- | --- | --- | 
+| `algorithm` | Stress test loop algorithm. Available values: `incremental`, `bisection`. | `incremental`  |
+| `provisioning` | When `true` (enabled), the `provision` and `import-dump` operations are run before, and the `teardown` operation is run after test in each iteration. Warm-up is applied in all iterations. When `false` (disabled), there is no provisioning or teardown, and the warm-up is only applied in the first iteration. | `true` (enabled) |
+| `PROVISIONING_PARAMETERS` | Additional set of parameters passed to the provisioning command. | |
+| `maxIterations` | Maximum number of iterations of the stress test loop. | `10` iterations |
+| `dataset` | Dataset to be used. | `100u2c`  |
+| `warmUpPeriod` | Sets value of `warmUpPeriod` parameter. If `provisioning` is disabled the warm-up is only done in the first iteration. | `120` seconds  |
+| `sequentialUsersFrom` | Value for the `sequentialUsersFrom` test parameter. If provisioning is disabled the value passed to the test command will be multiplied with each iteration. To be used with registration test scenario. | `-1` (random user iteration) |
+
+
+## Incremental Method
+
+Incremental stress test is a loop with gradually increasing load being put on the system.
+The cycle breaks with the first loop that fails the performance assertions, or after a maximum number of iterations
+
+It is useful for testing how various performance metrics evolve dependning on linear increments of load.
+
+### Parameters of Incremental Stress Test
+
+| Environment Variable | Description | Default Value |
+| --- | --- | --- | 
+| `usersPerSec0` | Value of `usersPerSec` parameter for the first iteration. | `5` user per second |
+| `incrementFactor` | Factor of increment of `usersPerSec` with each subsequent iteration. The `usersPerSec` for iteration `i` (counted from 0) is computed as `usersPerSec0 + i * incrementFactor`. | `1` |
+
+
+## Bisection Method
+
+This method (also called interval halving method) halves an interval defined by the lowest and highest expected value.
+The test is performed with a load value from the middle of the specified interval and depending on the result either the lower or the upper half is used in the next iteration.
+The cycle breaks when the interval gets smaller than a specified tolerance value, or after a maximum number of iterations.
+
+If set up properly the bisection algorithm is typically faster and more precise than the incremental method.
+However it doesn't show metrics evolving with the linear progression of load.
+
+### Parameters of Bisection Stress Test
+
+| Environment Variable | Description | Default Value |
+| --- | --- | --- | 
+| `lowPoint` | The lower bound of the halved interval. Should be set to the lowest reasonably expected value of maximum performance. | `0` users per second |
+| `highPoint` | The upper bound of the halved interval. | `10` users per second |
+| `tolerance` | Indicates the precision of measurement. The stress test loop stops when the size of the halved interval is lower than this value. | `1` users per second |
+

diff --git a/testsuite/performance/stress-test.sh b/testsuite/performance/stress-test.sh
new file mode 100755
index 0000000..ca4f9af
--- /dev/null
+++ b/testsuite/performance/stress-test.sh
@@ -0,0 +1,117 @@
+#!/bin/bash
+
+BASEDIR=$(cd "$(dirname "$0")"; pwd)
+cd $BASEDIR
+
+. ./stress-test-config.sh
+
+MVN=${MVN:-mvn}
+PROVISIONING_PARAMETERS=${PROVISIONING_PARAMETERS:-}
+PROVISION_COMMAND="$MVN verify -P provision,import-dump $PROVISIONING_PARAMETERS -Ddataset=$dataset"
+TEARDOWN_COMMAND="$MVN verify -P teardown"
+
+function runCommand {
+    echo "  $1"
+    echo 
+    if ! $debug; then eval "$1"; fi
+}
+
+function runTest {
+
+    # use specified warmUpPeriod only in the first iteration, or if provisioning is enabled
+    if [[ $i == 0 || $provisioning == true ]]; then 
+        warmUpParameter="-DwarmUpPeriod=$warmUpPeriod ";
+    else 
+        warmUpParameter="-DwarmUpPeriod=0 ";
+    fi
+    if [[ $sequentialUsersFrom == -1 || $provisioning == true ]]; then
+        sequentialUsers=$sequentialUsersFrom
+    else
+        sequentialUsers=`echo "$sequentialUsersFrom * ( $i + 1 )" | bc`
+    fi
+
+    TEST_COMMAND="$MVN verify -Ptest $@ -Ddataset=$dataset $warmUpParameter -DfilterResults=true -DsequentialUsersFrom=$sequentialUsers -DusersPerSec=$usersPerSec"
+
+    echo "ITERATION: $(( i+1 )) / $maxIterations      $ITERATION_INFO"
+    echo 
+
+    if $provisioning; then 
+        runCommand "$PROVISION_COMMAND"
+        if [[ $? != 0 ]]; then
+            echo "Provisioning failed."
+            runCommand "$TEARDOWN_COMMAND" || break
+            break
+        fi
+        runCommand "$TEST_COMMAND"
+        export testResult=$?
+        runCommand "$TEARDOWN_COMMAND" || exit 1
+    else
+        runCommand "$TEST_COMMAND"
+        export testResult=$?
+    fi
+
+    [[ $testResult != 0 ]] && echo "Test exit code: $testResult"
+
+}
+
+
+
+echo "Starting ${algorithm} stress test"
+echo
+
+usersPerSecTop=0
+
+case "${algorithm}" in
+
+    incremental)
+
+        for (( i=0; i < $maxIterations; i++)); do
+
+            usersPerSec=`echo "$usersPerSec0 + $i * $incrementFactor" | bc`
+
+            runTest $@
+
+            if [[ $testResult == 0 ]]; then 
+                usersPerSecTop=$usersPerSec
+            else
+                echo "INFO: Last iteration failed. Stopping the loop."
+                break
+            fi
+
+        done
+
+    ;;
+
+    bisection)
+
+        for (( i=0; i < $maxIterations; i++)); do
+
+            intervalSize=`echo "$highPoint - $lowPoint" | bc`
+            usersPerSec=`echo "$lowPoint + $intervalSize * 0.5" | bc`
+            if [[ `echo "$intervalSize < $tolerance" | bc`  == 1 ]]; then echo "INFO: intervalSize < tolerance. Stopping the loop."; break; fi
+            if [[ `echo "$intervalSize < 0" | bc`           == 1 ]]; then echo "ERROR: Invalid state: lowPoint > highPoint. Stopping the loop."; exit 1; fi
+            ITERATION_INFO="L: $lowPoint    H: $highPoint   intervalSize: $intervalSize   tolerance: $tolerance"
+
+            runTest $@
+
+            if [[ $testResult == 0 ]]; then 
+                usersPerSecTop=$usersPerSec
+                echo "INFO: Last iteration succeeded. Continuing with the upper half of the interval."
+                lowPoint=$usersPerSec
+            else
+                echo "INFO: Last iteration failed. Continuing with the lower half of the interval."
+                highPoint=$usersPerSec
+            fi
+
+        done
+
+    ;;
+
+    *) 
+        echo "Algorithm '${algorithm}' not supported."
+        exit 1
+    ;;
+
+esac
+
+echo "Highest load with passing test: $usersPerSecTop users per second"

diff --git a/testsuite/performance/stress-test-config.sh b/testsuite/performance/stress-test-config.sh
new file mode 100755
index 0000000..7d11a05
--- /dev/null
+++ b/testsuite/performance/stress-test-config.sh
@@ -0,0 +1,22 @@
+#!/bin/bash
+
+# common settings
+export algorithm=incremental
+export provisioning=false
+export maxIterations=10
+
+export dataset=100u2c
+export warmUpPeriod=120
+export sequentialUsersFrom=-1
+
+# incremental 
+export usersPerSec0=5
+export incrementFactor=1
+
+# bisection
+export lowPoint=0.000
+export highPoint=10.000
+export tolerance=1.000
+
+# other
+export debug=false

diff --git a/testsuite/performance/tests/src/main/java/org/keycloak/performance/log/LogLine.java b/testsuite/performance/tests/src/main/java/org/keycloak/performance/log/LogLine.java
index 4fa33de..333b2be 100644
--- a/testsuite/performance/tests/src/main/java/org/keycloak/performance/log/LogLine.java
+++ b/testsuite/performance/tests/src/main/java/org/keycloak/performance/log/LogLine.java
@@ -89,7 +89,9 @@ class LogLine {
     LogLine parse() {
         String[] cols = rawLine.split("\\t");
 
-        if ("RUN".equals(cols[2])) {
+        if ("ASSERTION".equals(cols[0])) {
+            type = Type.ASSERTION;
+        } else if ("RUN".equals(cols[2])) {
             type = Type.RUN;
             simulationClass = cols[0];
             simulationId = cols[1];
@@ -139,6 +141,9 @@ class LogLine {
      */
     public String compose() {
         switch (type()) {
+            case ASSERTION: {
+                return rawLine;
+            }
             case RUN: {
                 return simulationClass + "\t" + simulationId + "\t" + type.caption() + "\t" + start + "\t"+ description +"\t2.0\t";
             }
@@ -160,6 +165,7 @@ class LogLine {
 
 
     enum Type {
+        ASSERTION("ASSERTION"),
         RUN("RUN"),
         REQUEST("REQUEST\t"),
         USER_START("USER\tSTART"),

diff --git a/testsuite/performance/tests/src/main/java/org/keycloak/performance/log/LogProcessor.java b/testsuite/performance/tests/src/main/java/org/keycloak/performance/log/LogProcessor.java
index 55f6889..1eb299c 100644
--- a/testsuite/performance/tests/src/main/java/org/keycloak/performance/log/LogProcessor.java
+++ b/testsuite/performance/tests/src/main/java/org/keycloak/performance/log/LogProcessor.java
@@ -192,6 +192,11 @@ public class LogProcessor {
             LogLine line;
             while ((line = reader.readLine()) != null) {
 
+                if (line.type() == LogLine.Type.ASSERTION) {
+                    output.println(line.rawLine());
+                    continue;
+                }
+
                 if (line.type() == LogLine.Type.RUN) {
                     // adjust start time of simulation
                     line.setStart(start);

diff --git a/testsuite/performance/tests/src/main/java/org/keycloak/performance/TestConfig.java b/testsuite/performance/tests/src/main/java/org/keycloak/performance/TestConfig.java
index 1aef0c9..cba6b72 100644
--- a/testsuite/performance/tests/src/main/java/org/keycloak/performance/TestConfig.java
+++ b/testsuite/performance/tests/src/main/java/org/keycloak/performance/TestConfig.java
@@ -103,6 +103,10 @@ public class TestConfig {
         serverUrisList = Arrays.asList(serverUris.split(" "));
         serverUrisIterator = new LoopingIterator<>(serverUrisList);
     }
+    
+    // assertion properties
+    public static final int maxFailedRequests = Integer.getInteger("maxFailedRequests", 0);
+    public static final int maxMeanReponseTime = Integer.getInteger("maxMeanReponseTime", 300);
 
     // Users iterators by realm
     private static final ConcurrentMap<String, Iterator<UserInfo>> usersIteratorMap = new ConcurrentHashMap<>();
@@ -172,6 +176,13 @@ public class TestConfig {
                 hashIterations);
     }
     
+    public static String toStringAssertionProperties() {
+        return String.format("  maxFailedRequests: %s\n"
+                + "  maxMeanReponseTime: %s",
+                maxFailedRequests,
+                maxMeanReponseTime);
+    }
+    
     public static Iterator<UserInfo> sequentialUsersIterator(final String realm) {
 
         return new Iterator<UserInfo>() {

diff --git a/testsuite/performance/tests/src/test/scala/keycloak/CommonSimulation.scala b/testsuite/performance/tests/src/test/scala/keycloak/CommonSimulation.scala
index ded6c15..6811557 100644
--- a/testsuite/performance/tests/src/test/scala/keycloak/CommonSimulation.scala
+++ b/testsuite/performance/tests/src/test/scala/keycloak/CommonSimulation.scala
@@ -23,6 +23,8 @@ abstract class CommonSimulation extends Simulation {
   println()
   println("Using dataset properties:\n" + TestConfig.toStringDatasetProperties)
   println()
+  println("Using assertion properties:\n" + TestConfig.toStringAssertionProperties)
+  println()
   println("Timestamps: \n" + TestConfig.toStringTimestamps)
   println()
   

diff --git a/testsuite/performance/tests/src/test/scala/keycloak/OIDCLoginAndLogoutSimulation.scala b/testsuite/performance/tests/src/test/scala/keycloak/OIDCLoginAndLogoutSimulation.scala
index e284897..7dfedf4 100644
--- a/testsuite/performance/tests/src/test/scala/keycloak/OIDCLoginAndLogoutSimulation.scala
+++ b/testsuite/performance/tests/src/test/scala/keycloak/OIDCLoginAndLogoutSimulation.scala
@@ -17,5 +17,10 @@ class OIDCLoginAndLogoutSimulation extends CommonSimulation {
   val usersScenario = scenario("Logging-in Users").exec(loginAndLogoutScenario.chainBuilder)
 
   setUp(usersScenario.inject(defaultInjectionProfile).protocols(httpDefault))
-  
+
+  .assertions(
+    global.failedRequests.count.lessThan(TestConfig.maxFailedRequests + 1),
+    global.responseTime.mean.lessThan(TestConfig.maxMeanReponseTime)
+  )
+    
 }

diff --git a/testsuite/performance/tests/src/test/scala/keycloak/OIDCRegisterAndLogoutSimulation.scala b/testsuite/performance/tests/src/test/scala/keycloak/OIDCRegisterAndLogoutSimulation.scala
index f050f46..7c2eb79 100644
--- a/testsuite/performance/tests/src/test/scala/keycloak/OIDCRegisterAndLogoutSimulation.scala
+++ b/testsuite/performance/tests/src/test/scala/keycloak/OIDCRegisterAndLogoutSimulation.scala
@@ -17,5 +17,10 @@ class OIDCRegisterAndLogoutSimulation extends CommonSimulation {
   val usersScenario = scenario("Registering Users").exec(registerAndLogoutScenario.chainBuilder)
 
   setUp(usersScenario.inject(defaultInjectionProfile).protocols(httpDefault))
-  
+
+  .assertions(
+    global.failedRequests.count.lessThan(TestConfig.maxFailedRequests + 1),
+    global.responseTime.mean.lessThan(TestConfig.maxMeanReponseTime)
+  )
+
 }