add project with license and readme and 100% code coverage

Author: scolladon

LICENSE.md

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2018 Sebastien Colladon
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -0,0 +1,19 @@
+## Apex Chainable
+TBD
+
+## Usage
+TBD
+
+```apex
+/*TODO*/
+```
+
+## Improvement
+
+BatchIterable and ScheduleBatchIterable
+
+## Installation
+<a href="https://githubsfdeploy.herokuapp.com?owner=scolladon&repo=apex-chainable">
+  <img alt="Deploy to Salesforce"
+       src="https://raw.githubusercontent.com/afawcett/githubsfdeploy/master/deploy.png">
+</a>

src/classes/chain_Batch.cls

@@ -0,0 +1,39 @@
+public inherited sharing abstract class chain_Batch extends chain_Chainable implements Database.Batchable<sObject> {
+  private Database.BatchableContext bc;
+  private List<sObject> scope;
+
+  public chain_Batch(){
+    super();
+  }
+
+  protected override abstract void job();
+
+  public abstract Database.QueryLocator start(Database.BatchableContext bc);
+
+  public virtual void execute(Database.BatchableContext bd, List<sObject> scope){
+    this.bc = bc;
+    this.scope = scope;
+    try {
+      this.job();
+    } catch(Exception ex) {
+      if(this.canBreak == true) {
+        throw ex;
+      }
+    }
+  }
+
+  public virtual void finish(Database.BatchableContext bc){
+    this.chain();
+  }
+
+  public virtual override void executeChain() {
+    Database.executeBatch(this);
+  }
+
+  public override chain_Chainable add(final chain_Chainable aChain) {
+    if(!(aChain instanceof chain_Future)) {
+      return super.add(aChain);
+    }
+    return this;
+  }
+}

src/classes/chain_Batch.cls-meta.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ApexClass xmlns="http://soap.sforce.com/2006/04/metadata">
+    <apiVersion>44.0</apiVersion>
+    <status>Active</status>
+</ApexClass>

src/classes/chain_Batch_TEST.cls

@@ -0,0 +1,49 @@
+@isTest
+public class chain_Batch_TEST extends chain_Batch {
+  public override Database.QueryLocator start(Database.BatchableContext bc) {
+    return Database.getQueryLocator('select id from account limit 1');
+  }
+
+  public chain_Batch_TEST(){
+    super();
+  }
+
+  public chain_Batch_TEST(final boolean canBreak){
+    this();
+    this.canBreak = canBreak;
+  }
+
+  protected override void job() {
+    System.Debug('chain_Batch_TEST');
+    if(this.canBreak == true) {
+      throw new chain_BatchException();
+    }
+  }
+
+  public class chain_BatchException extends Exception{}
+
+  @testSetup
+  static void setup(){
+    insert new Account(name='test');
+  }
+
+  @isTest
+  static void testFail() {
+    chain_Batch_TEST aChainable = new chain_Batch_TEST(true);
+
+    test.startTest();
+    try {
+      aChainable.execute(null,null);
+    } catch(chain_BatchException ex){}
+    test.stopTest();
+  }
+
+  @isTest
+  static void testSuccess() {
+    chain_Chainable aChainable = new chain_Batch_TEST();
+
+    test.startTest();
+    aChainable.executeChain();
+    test.stopTest();
+  }
+}

src/classes/chain_Batch_TEST.cls-meta.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ApexClass xmlns="http://soap.sforce.com/2006/04/metadata">
+    <apiVersion>44.0</apiVersion>
+    <status>Active</status>
+</ApexClass>

src/classes/chain_Chainable.cls

@@ -0,0 +1,29 @@
+public inherited sharing abstract class chain_Chainable {
+  protected chain_Chainable nextJob;
+  protected boolean canBreak;
+  protected abstract void job();
+
+  // Deal with add enqueue readding reenqueue
+
+  public chain_Chainable() {
+    this.canBreak = false;
+  }
+
+  public abstract void executeChain();
+
+  public virtual chain_Chainable add(final chain_Chainable aChain) {
+    this.nextJob = aChain;
+    chain_Chainable tempChain = aChain;
+    while(tempChain != null && tempChain.nextJob != null) {
+      tempChain = tempChain.nextJob;
+    }
+    return tempChain;
+  }
+
+  protected void chain() {
+    if(this.nextJob != null) {
+      this.nextJob.executeChain();
+      this.nextJob = null;
+    }
+  }
+}

src/classes/chain_Chainable.cls-meta.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ApexClass xmlns="http://soap.sforce.com/2006/04/metadata">
+    <apiVersion>44.0</apiVersion>
+    <status>Active</status>
+</ApexClass>

src/classes/chain_Chainable_TEST.cls

@@ -0,0 +1,50 @@
+@isTest
+private class chain_Chainable_TEST {
+  @testSetup
+  static void setup(){
+    insert new Account(name='test');
+  }
+
+  @isTest
+  static void testAll() {
+    chain_Chainable aChainable = new chain_Method_TEST();
+
+    chain_Chainable anotherChainable = new chain_Method_TEST();
+    anotherChainable.add(new chain_Method_TEST());
+
+    aChainable
+    .Add(anotherChainable)
+    .Add(new chain_Method_TEST())
+    .Add(new chain_Batch_TEST())
+    .Add(new chain_Future_TEST())
+    .Add(new chain_Schedule_TEST('test','0 0 * * * ?'))
+    .Add(new chain_Future_TEST())
+    .Add(new chain_Future_TEST())
+    .Add(new chain_ScheduleBatch_TEST('test',1,1))
+    .Add(new chain_Future_TEST())
+    .Add(new chain_Queue_TEST())
+    ;
+
+    test.startTest();
+    aChainable.executeChain();
+    test.stopTest();
+  }
+
+  @isTest
+  static void testQueue() {
+    chain_Chainable aChainable = new chain_Queue_TEST();
+
+    test.startTest();
+    aChainable.executeChain();
+    test.stopTest();
+  }
+
+    @isTest
+  static void testScheduleBatch() {
+    chain_Chainable aChainable = new chain_ScheduleBatch_TEST('test',1,-1);
+
+    test.startTest();
+    aChainable.executeChain();
+    test.stopTest();
+  }
+}

src/classes/chain_Chainable_TEST.cls-meta.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ApexClass xmlns="http://soap.sforce.com/2006/04/metadata">
+    <apiVersion>44.0</apiVersion>
+    <status>Active</status>
+</ApexClass>