diff --git a/build.gradle b/build.gradle
index fc351ec..db35cb4 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,5 +1,6 @@
 plugins {
     id 'java'
+    id 'java-library'
 }
 
 sourceSets {
@@ -28,7 +29,9 @@ repositories {
 }
 
 dependencies {
-    implementation project(":common")
-
+    api project(":common")
+    api 'io.prometheus:simpleclient:0.12.0'
+    api 'org.knowhowlab.osgi:sigar:1.6.5_01'
+    api fileTree(dir: 'libs', include: '*.jar')
     testImplementation 'junit:junit:4.13.2'
 }
diff --git a/src/main/java/org/bdware/sc/ContractClient.java b/src/main/java/org/bdware/sc/ContractClient.java
index 514f349..02400b7 100644
--- a/src/main/java/org/bdware/sc/ContractClient.java
+++ b/src/main/java/org/bdware/sc/ContractClient.java
@@ -3,7 +3,6 @@ package org.bdware.sc;
 import com.google.gson.JsonObject;
 import com.google.gson.JsonPrimitive;
 import com.google.gson.reflect.TypeToken;
-import org.apache.commons.lang3.StringUtils;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.bdware.sc.ContractResult.Status;
@@ -267,7 +266,7 @@ public class ContractClient {
                         (isDebug ? "-debug" : ""));
         File directory = new File("");
         LOGGER.debug("[CMD] path: " + directory.getAbsolutePath());
-        LOGGER.debug(StringUtils.join(builder.command(), " "));
+        LOGGER.debug(JsonUtil.toPrettyJson(builder.command()));
 
         Map<String, String> map = builder.environment();
         map.put("java.library.path", jniPath.getAbsolutePath() + osJni);
diff --git a/src/main/java/org/bdware/sc/ContractStatusRecorder.java b/src/main/java/org/bdware/sc/ContractStatusRecorder.java
index 5f47f1c..6b858db 100644
--- a/src/main/java/org/bdware/sc/ContractStatusRecorder.java
+++ b/src/main/java/org/bdware/sc/ContractStatusRecorder.java
@@ -1,6 +1,5 @@
 package org.bdware.sc;
 
-import org.apache.commons.lang3.StringUtils;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.bdware.sc.ContractPort.PortVisitor;
@@ -113,11 +112,15 @@ public class ContractStatusRecorder extends StatusRecorder<ContractMeta> {
 
     public void reSyncStatusAtStart() {
         List<String> toPrint = new ArrayList<>();
+        Set<ContractMeta> toRemove = new HashSet<>();
         for (ContractMeta meta : getStatus().values()) {
             toPrint.add(meta.status + " " + meta.id + " " + meta.name + " ");
+            if (meta.contract == null)
+                toRemove.add(meta);
         }
         LOGGER.debug(JsonUtil.toPrettyJson(toPrint));
-
+        for (ContractMeta meta : toRemove)
+            remove(meta);
         for (String id : id2ContractClient.keySet()) {
             ContractMeta meta = getStatus().get(id);
             if (null == meta) {
@@ -251,7 +254,7 @@ public class ContractStatusRecorder extends StatusRecorder<ContractMeta> {
     }
 
     public ContractClient getContractClient(String idOrName) {
-        if (StringUtils.isBlank(idOrName)) {
+        if (idOrName == null || idOrName.length() == 0) {
             return null;
         }
         // TODO ensure load contract client
diff --git a/src/main/java/org/bdware/sc/DoipServiceInfoConfigurer.java b/src/main/java/org/bdware/sc/DoipServiceInfoConfigurer.java
new file mode 100644
index 0000000..44754b8
--- /dev/null
+++ b/src/main/java/org/bdware/sc/DoipServiceInfoConfigurer.java
@@ -0,0 +1,14 @@
+package org.bdware.sc;
+
+import org.bdware.doip.application.DoipServiceConfig;
+import org.bdware.doip.endpoint.doipServer.DoipServiceInfo;
+
+public interface DoipServiceInfoConfigurer {
+    String getServiceHandle();
+
+    String resetServiceConfig(String configJson);
+
+    DoipServiceConfig getDoipServiceConfig();
+
+    DoipServiceInfo getDoipServiceInfo();
+}
diff --git a/src/main/java/org/bdware/sc/units/MultiContractMeta.java b/src/main/java/org/bdware/sc/units/MultiContractMeta.java
index 3198432..a8fa797 100644
--- a/src/main/java/org/bdware/sc/units/MultiContractMeta.java
+++ b/src/main/java/org/bdware/sc/units/MultiContractMeta.java
@@ -154,7 +154,16 @@ public class MultiContractMeta implements IDSerializable {
     public String[] getMembers() {
         return members;
     }
-
+    public String joinMembers(String delimiter){
+        StringBuilder sb = new StringBuilder();
+        if (members.length > 0)
+            sb.append(members[0]);
+        else return "";
+        for (int i = 1; i < members.length; i++) {
+            sb.append(delimiter).append(members[i]);
+        }
+        return sb.toString();
+    }
     public void setMembers(String[] m) {
         members = m;
     }