Started with multitenancy

Issue #15

api/src/main/java/org/fuin/esc/api/ProjectionStreamId.java

@@ -72,38 +72,29 @@ public final String asString() {
         return name;
     }
 
-    @Override
-    public final String toString() {
-        return name;
-    }
-
-    // CHECKSTYLE:OFF Generated code
-
     @Override
     public final int hashCode() {
-        final int prime = 31;
-        int result = 1;
-        result = prime * result + ((name == null) ? 0 : name.hashCode());
-        return result;
+        return name.hashCode();
     }
 
     @Override
-    public final boolean equals(Object obj) {
-        if (this == obj)
+    public final boolean equals(final Object obj) {
+        if (this == obj) {
             return true;
-        if (obj == null)
+        }
+        if (obj == null) {
             return false;
-        if (!(obj instanceof ProjectionStreamId))
+        }
+        if (getClass() != obj.getClass()) {
             return false;
-        ProjectionStreamId other = (ProjectionStreamId) obj;
-        if (name == null) {
-            if (other.name != null)
-                return false;
-        } else if (!name.equals(other.name))
-            return false;
-        return true;
+        }
+        final ProjectionStreamId other = (ProjectionStreamId) obj;
+        return name.equals(other.name);
     }
 
-    // CHECKSTYLE:ON
+    @Override
+    public final String toString() {
+        return name;
+    }
 
 }

api/src/main/java/org/fuin/esc/api/SimpleStreamId.java

@@ -72,38 +72,29 @@ public final String asString() {
         return name;
     }
 
-    @Override
-    public final String toString() {
-        return name;
-    }
-
-    // CHECKSTYLE:OFF Generated code
-
     @Override
     public final int hashCode() {
-        final int prime = 31;
-        int result = 1;
-        result = prime * result + ((name == null) ? 0 : name.hashCode());
-        return result;
+        return name.hashCode();
     }
 
     @Override
-    public final boolean equals(Object obj) {
-        if (this == obj)
+    public final boolean equals(final Object obj) {
+        if (this == obj) {
             return true;
-        if (obj == null)
+        }
+        if (obj == null) {
             return false;
-        if (!(obj instanceof SimpleStreamId))
+        }
+        if (getClass() != obj.getClass()) {
             return false;
-        SimpleStreamId other = (SimpleStreamId) obj;
-        if (name == null) {
-            if (other.name != null)
-                return false;
-        } else if (!name.equals(other.name))
-            return false;
-        return true;
+        }
+        final SimpleStreamId other = (SimpleStreamId) obj;
+        return name.equals(other.name);
     }
 
-    // CHECKSTYLE:ON
+    @Override
+    public final String toString() {
+        return name;
+    }
 
 }

api/src/main/java/org/fuin/esc/api/SimpleTenantId.java

@@ -0,0 +1,76 @@
+/**
+ * Copyright (C) 2015 Michael Schnell. All rights reserved. 
+ * http://www.fuin.org/
+ *
+ * This library is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU Lesser General Public License as published by the Free
+ * Software Foundation; either version 3 of the License, or (at your option) any
+ * later version.
+ *
+ * This library is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library. If not, see http://www.gnu.org/licenses/.
+ */
+package org.fuin.esc.api;
+
+import javax.validation.constraints.NotNull;
+
+import org.fuin.objects4j.common.Contract;
+import org.fuin.objects4j.common.Immutable;
+
+/**
+ * Tenant identifier that is based on a name.
+ */
+@Immutable
+public final class SimpleTenantId implements TenantId {
+
+    private static final long serialVersionUID = 1L;
+
+    private final String name;
+
+    /**
+     * Constructor with mandatory data.
+     * 
+     * @param name
+     *            Unique name.
+     */
+    public SimpleTenantId(@NotNull final String name) {
+        Contract.requireArgNotNull("name", name);
+        this.name = name;
+    }
+
+    @Override
+    public final String asString() {
+        return name;
+    }
+
+    @Override
+    public final int hashCode() {
+        return name.hashCode();
+    }
+
+    @Override
+    public final boolean equals(final Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        final SimpleTenantId other = (SimpleTenantId) obj;
+        return name.equals(other.name);
+    }
+
+    @Override
+    public final String toString() {
+        return name;
+    }
+
+}

api/src/main/java/org/fuin/esc/api/StreamId.java

@@ -25,13 +25,12 @@
 import org.fuin.objects4j.vo.KeyValue;
 
 /**
- * Name of a stream that is unique within the event store.
+ * Name of a stream that is unique within the event store.<br>
+ * <br>
+ * CAUTION: Stream identifier should only be compared based on their {@link #asString()} method.
  */
 public interface StreamId extends Serializable {
 
-    /** Uniquely identifies the stream that contains all events. */
-    public StreamId ALL = new SimpleStreamId(StreamId.class.getName() + "ALL");
-
     /**
      * Returns the name of the stream.
      * 
@@ -43,16 +42,13 @@ public interface StreamId extends Serializable {
     /**
      * Returns the information if this identifier points to a projection.
      * 
-     * @return TRUE if this is an identifier for a projection, else FALSE
-     *         (stream).
+     * @return TRUE if this is an identifier for a projection, else FALSE (stream).
      */
     public boolean isProjection();
 
     /**
-     * Convenience method that returns the one-and-only parameter value.
-     * CAUTION: This method will throw an exception if there are no parameters,
-     * more than one parameter or the type of the value cannot be casted to the
-     * expected result type.
+     * Convenience method that returns the one-and-only parameter value. CAUTION: This method will throw an exception if there are no
+     * parameters, more than one parameter or the type of the value cannot be casted to the expected result type.
      * 
      * @return Value of the single parameter.
      * 
@@ -63,11 +59,9 @@ public interface StreamId extends Serializable {
     public <T> T getSingleParamValue();
 
     /**
-     * Returns the parameters used in addition to the pure stream name to
-     * identify the stream.
+     * Returns the parameters used in addition to the pure stream name to identify the stream.
      * 
-     * @return Ordered unmodifiable list of parameters - May be empty if no
-     *         parameters exist.
+     * @return Ordered unmodifiable list of parameters - May be empty if no parameters exist.
      */
     @NotNull
     public List<KeyValue> getParameters();

api/src/main/java/org/fuin/esc/api/TenantId.java

@@ -0,0 +1,36 @@
+/**
+ * Copyright (C) 2015 Michael Schnell. All rights reserved. 
+ * http://www.fuin.org/
+ *
+ * This library is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU Lesser General Public License as published by the Free
+ * Software Foundation; either version 3 of the License, or (at your option) any
+ * later version.
+ *
+ * This library is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library. If not, see http://www.gnu.org/licenses/.
+ */
+package org.fuin.esc.api;
+
+import java.io.Serializable;
+
+/**
+ * Unique tenant identifier<br>
+ * <br>
+ * CAUTION: Tenant identifier should only be compared based on their {@link #asString()} method.
+ */
+public interface TenantId extends Serializable {
+
+    /**
+     * Returns the identifier as string.
+     * 
+     * @return String representation of the ID.
+     */
+    public String asString();
+
+}

api/src/test/java/org/fuin/esc/api/ProjectionStreamIdTest.java

@@ -46,7 +46,7 @@ public void teardown() {
 
     @Test
     public void testEqualsHashCode() {
-        EqualsVerifier.forClass(ProjectionStreamId.class).verify();
+        EqualsVerifier.forClass(ProjectionStreamId.class).withNonnullFields("name").verify();
     }
 
     @Test

api/src/test/java/org/fuin/esc/api/SimpleStreamIdTest.java

@@ -46,7 +46,7 @@ public void teardown() {
 
     @Test
     public void testEqualsHashCode() {
-        EqualsVerifier.forClass(SimpleStreamId.class).verify();
+        EqualsVerifier.forClass(SimpleStreamId.class).withNonnullFields("name").verify();
     }
 
     @Test

api/src/test/java/org/fuin/esc/api/SimpleTenantIdTest.java

@@ -0,0 +1,57 @@
+/**
+ * Copyright (C) 2015 Michael Schnell. All rights reserved. 
+ * http://www.fuin.org/
+ *
+ * This library is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU Lesser General Public License as published by the Free
+ * Software Foundation; either version 3 of the License, or (at your option) any
+ * later version.
+ *
+ * This library is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library. If not, see http://www.gnu.org/licenses/.
+ */
+package org.fuin.esc.api;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+import nl.jqno.equalsverifier.EqualsVerifier;
+
+/**
+ * Tests the {@link SimpleTenantId} class.
+ */
+public class SimpleTenantIdTest {
+
+    private static final String NAME = "mycompany";
+
+    private SimpleTenantId testee;
+
+    @Before
+    public void setup() {
+        testee = new SimpleTenantId(NAME);
+    }
+
+    @After
+    public void teardown() {
+        testee = null;
+    }
+
+    @Test
+    public void testEqualsHashCode() {
+        EqualsVerifier.forClass(SimpleTenantId.class).withNonnullFields("name").verify();
+    }
+
+    @Test
+    public void testGetter() {
+        assertThat(testee.asString()).isEqualTo(NAME);
+    }
+
+}