Create sysconfig Environment Provider

modules/sysconfig/src/main/java/org/jpos/ee/SysConfigEnvironmentProvider.java

@@ -0,0 +1,28 @@
+package org.jpos.ee;
+
+import org.jpos.core.EnvironmentProvider;
+import java.util.Objects;
+
+public class SysConfigEnvironmentProvider implements EnvironmentProvider {
+    protected <T> T exec(DBAction<T> action) throws Exception {
+        return org.jpos.ee.DB.exec(action);
+    }
+
+    public String prefix() {
+        return "sys::";
+    }
+
+    @Override
+    public String get(String config) {
+        Objects.requireNonNull(config);
+
+        try {
+            return exec(db -> {
+                SysConfigManager scm = new SysConfigManager(db);
+                return scm.get(config);
+            });
+        } catch (Exception ex) {
+            throw new RuntimeException(ex);
+        }
+    }
+}

modules/sysconfig/src/main/resources/META-INF/services/org.jpos.core.EnvironmentProvider

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+org.jpos.ee.SysConfigEnvironmentProvider

modules/sysconfig/src/test/java/org/jpos/ee/SysConfigEnvironmentProviderTest.java

@@ -0,0 +1,31 @@
+package org.jpos.ee;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+public class SysConfigEnvironmentProviderTest {
+
+    @SuppressWarnings("unchecked")
+    SysConfigEnvironmentProvider getProvider() {
+        return new SysConfigEnvironmentProvider() {
+            @Override
+            protected <T> T exec(DBAction<T> action) throws Exception {
+                return (T) "someValue";
+            }
+        };
+    }
+
+    @Test
+    void testGetValue() {
+        SysConfigEnvironmentProvider p = getProvider();
+        String value = p.get("someKey");
+        assertEquals("someValue", value);
+    }
+
+    @Test
+    void testKeyIsNull() {
+        assertThrows(NullPointerException.class, () -> getProvider().get(null));
+    }
+}