+import javax.sql.DataSource;
+
+/**
+ *
+ * @author $author$
+ * @version $Revision$
+ */
+public class Environment extends AbstractComponent<Object> {
+ private static int COUNT = 0;
+
+ private EventTracker<String> tracker;
+
+ private double random;
+
+ private int integer;
+
+ /**
+ * Creates a new Environment object.
+ */
+ public Environment() {
+ this("environment");
+ }
+
+ /**
+ * Creates a new Environment object.
+ *
+ */
+ public Environment(String aName) {
+ this(aName, "");
+ }
+
+ /**
+ * Creates a new Environment object.
+ *
+ */
+ public Environment(String aName, String aPrefix) {
+ super(aName, provided(aPrefix), new RequiredInterface[0]);
+ random = Math.random();
+ integer = COUNT++;
+ }
+
+ /**
+ * Creates a new Environment object.
+ *
+ */
+ public Environment(EventTracker aTracker) {
+ this();
+ tracker = aTracker;
+ }
+
+ private static final ProvidedInterface[] provided(String aPrefix) {
+ return new ProvidedInterface[] {
+ new DefaultProvidedInterface(aPrefix + "datasource", String.class),
+ new DefaultProvidedInterface(aPrefix + "integer", Integer.class) };
+ }
+
+ public Integer getInteger() {
+ return integer;
+ }
+
+ public String getString() {
+ return getName() + ".hello";
+ }
+
+ @Override
+ protected Object doStart(Scope aScope) {
+ addInterface(getProvidedInterfaces().get(0), getString(), aScope);
+ addInterface(getProvidedInterfaces().get(1), getInteger(), aScope);
+ track("start." + getName());
+
+ return random;
+ }
+
+ @Override
+ protected void doStop(Object aRuntime) {
+ track("stop." + getName());
+
+ if (random != (Double) aRuntime) {
+ throw new IllegalArgumentException("Wrong runtime: expected " +
+ random + " but got " + aRuntime);
+ }
+ }
+
+ private void track(String aString) {
+ if (tracker == null) {
+ return;
+ }