SONAR-7422 add DefaultProcessCommand#reset()

2 files changed, 27 insertions, 1 deletions

diff --git a/server/sonar-process/src/main/java/org/sonar/process/DefaultProcessCommands.java b/server/sonar-process/src/main/java/org/sonar/process/DefaultProcessCommands.java
index dade6ab6265..7a4182d6cee 100644
--- a/server/sonar-process/src/main/java/org/sonar/process/DefaultProcessCommands.java
+++ b/server/sonar-process/src/main/java/org/sonar/process/DefaultProcessCommands.java
@@ -52,6 +52,15 @@ public class DefaultProcessCommands implements ProcessCommands {
     return new DefaultProcessCommands(directory, processNumber, false);
   }
 
+  /**
+   * Clears the shared memory space of the specified process number.
+   */
+  public static void reset(File directory, int processNumber) {
+    try (DefaultProcessCommands processCommands = new DefaultProcessCommands(directory, processNumber, true)) {
+      // nothing else to do than open file and reset the space of specified process
+    }
+  }
+
   @Override
   public boolean isUp() {
     return delegate.isUp();
diff --git a/server/sonar-process/src/test/java/org/sonar/process/DefaultProcessCommandsTest.java b/server/sonar-process/src/test/java/org/sonar/process/DefaultProcessCommandsTest.java
index 0b981e03ac0..80d510be988 100644
--- a/server/sonar-process/src/test/java/org/sonar/process/DefaultProcessCommandsTest.java
+++ b/server/sonar-process/src/test/java/org/sonar/process/DefaultProcessCommandsTest.java
@@ -126,7 +126,6 @@ public class DefaultProcessCommandsTest {
 
     DefaultProcessCommands.main(temp.newFolder(), processNumber);
   }
-
   @Test
   public void main_fails_if_processNumber_is_MAX_PROCESSES() throws Exception {
     int processNumber = MAX_PROCESSES;
@@ -154,6 +153,24 @@ public class DefaultProcessCommandsTest {
     DefaultProcessCommands.secondary(temp.newFolder(), processNumber);
   }
 
+  @Test
+  public void reset_fails_if_processNumber_is_less_than_0() throws Exception {
+    int processNumber = -2;
+
+    expectProcessNumberNoValidIAE(processNumber);
+
+    DefaultProcessCommands.reset(temp.newFolder(), processNumber);
+  }
+
+  @Test
+  public void reset_fails_if_processNumber_is_higher_than_MAX_PROCESSES() throws Exception {
+    int processNumber = MAX_PROCESSES + 1;
+
+    expectProcessNumberNoValidIAE(processNumber);
+
+    DefaultProcessCommands.reset(temp.newFolder(), processNumber);
+  }
+
   private void expectProcessNumberNoValidIAE(int processNumber) {
     expectedException.expect(IllegalArgumentException.class);
     expectedException.expectMessage("Process number " + processNumber + " is not valid");