Java tutorial
/** * Copyright 2017 Goldman Sachs. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ package com.gs.obevo.impl; import java.util.concurrent.TimeUnit; import com.gs.obevo.api.appdata.Change; import com.gs.obevo.api.appdata.Environment; import com.gs.obevo.api.appdata.PhysicalSchema; import com.gs.obevo.api.platform.MainDeployerArgs; import com.gs.obevo.api.platform.Platform; import org.apache.commons.lang3.time.StopWatch; import org.eclipse.collections.api.bag.MutableBag; import org.eclipse.collections.api.block.predicate.Predicate; import org.eclipse.collections.api.block.procedure.Procedure2; import org.eclipse.collections.api.collection.ImmutableCollection; import org.eclipse.collections.api.list.ImmutableList; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import static org.eclipse.collections.impl.block.factory.Predicates.and; public class MainInputReader<P extends Platform, E extends Environment<P>> { private static final Logger LOG = LoggerFactory.getLogger(MainInputReader.class); private final SourceChangeReader sourceChangeReader; private final Predicate<? super Change> dbChangeFilter; private final DeployMetricsCollector deployMetricsCollector; public MainInputReader(SourceChangeReader sourceChangeReader, Predicate<? super Change> dbChangeFilter, DeployMetricsCollector deployMetricsCollector) { this.sourceChangeReader = sourceChangeReader; this.dbChangeFilter = dbChangeFilter; this.deployMetricsCollector = deployMetricsCollector; } public void read(E env, final MainDeployerArgs deployerArgs) { StopWatch changeStopWatch = new StopWatch(); changeStopWatch.start(); boolean mainDeploymentSuccess = false; try { readInternal(env, deployerArgs); mainDeploymentSuccess = true; } finally { changeStopWatch.stop(); long deployRuntimeSeconds = TimeUnit.MILLISECONDS.toSeconds(changeStopWatch.getTime()); deployMetricsCollector.addMetric("runtimeSeconds", deployRuntimeSeconds); deployMetricsCollector.addMetric("success", mainDeploymentSuccess); } } protected DeployMetricsCollector getDeployMetricsCollector() { return deployMetricsCollector; } protected ImmutableList<Change> readInternal(E env, final MainDeployerArgs deployerArgs) { validateSetup(); if (deployerArgs.isRollback()) { LOG.info("*** EXECUTING IN ROLLBACK MODE ***"); } LOG.info("Now fetching the changed artifacts"); logArgumentMetrics(deployerArgs); logEnvironment(env); logEnvironmentMetrics(env); ImmutableList<Change> sourceChanges = sourceChangeReader.readSourceChanges(deployerArgs.isUseBaseline(), and(this.dbChangeFilter, deployerArgs.getChangeInclusionPredicate())); for (Change artf : sourceChanges) { artf.setEnvironment(env); } logChanges("source", sourceChanges); logChangeMetrics("source", sourceChanges); return sourceChanges; } public void logChanges(String logType, ImmutableCollection<Change> sourceChanges) { if (LOG.isInfoEnabled()) { LOG.info("Read {} changes from {}", sourceChanges.size(), logType); } if (LOG.isDebugEnabled()) { for (Change sourceChange : sourceChanges) { String locationLog = sourceChange.getFileLocation() != null ? ", File: " + sourceChange.getFileLocation() : ""; LOG.debug("-> {} Change: {}, Hash: {} {}", logType, sourceChange.getDisplayString(), sourceChange.getContentHash(), locationLog); } } } protected void validateSetup() { } private void logArgumentMetrics(MainDeployerArgs deployerArgs) { deployMetricsCollector.addMetric("args.onboardingMode", deployerArgs.isOnboardingMode()); deployMetricsCollector.addMetric("args.init", deployerArgs.isPerformInitOnly()); deployMetricsCollector.addMetric("args.rollback", deployerArgs.isRollback()); deployMetricsCollector.addMetric("args.preview", deployerArgs.isPreview()); deployMetricsCollector.addMetric("args.useBaseline", deployerArgs.isUseBaseline()); } protected void logEnvironment(E env) { if (LOG.isInfoEnabled()) { LOG.info("Environment information:"); LOG.info("Logical schemas [{}]: {}", env.getSchemaNames().size(), env.getSchemaNames().makeString(",")); LOG.info("Physical schemas [{}]: {}", env.getPhysicalSchemas().size(), env.getPhysicalSchemas().collect(PhysicalSchema.TO_PHYSICAL_NAME).makeString(",")); } } protected void logEnvironmentMetrics(E env) { deployMetricsCollector.addMetric("platform", env.getPlatform().getName()); deployMetricsCollector.addMetric("schemaCount", env.getSchemaNames().size()); deployMetricsCollector.addMetric("schemas", env.getSchemaNames().makeString(",")); deployMetricsCollector.addMetric("physicalSchemaCount", env.getPhysicalSchemas().size()); deployMetricsCollector.addMetric("physicalSchemas", env.getPhysicalSchemas().collect(PhysicalSchema.TO_PHYSICAL_NAME).makeString(",")); } private void logChangeMetrics(final String changeSide, ImmutableList<Change> changes) { MutableBag<String> changeTypeCounts = changes.collect(Change.TO_CHANGE_TYPE_NAME).toBag(); changeTypeCounts.toMapOfItemToCount().forEachKeyValue(new Procedure2<String, Integer>() { @Override public void value(String changeType, Integer count) { deployMetricsCollector.addMetric("changes." + changeSide + "." + changeType, count); } }); } }